(b) Only ∠i, and ∠A (c) Vacuum (d) Reddish appearance of the Sun at the sunrise. Question 11. Sunlight, considered to be white, actually appears to be a bit yellow because of its mixture of wavelengths, but it does contain all visible wavelengths. Why does the sun appear white at noon? is done on EduRev Study Group by Class 10 Students. It occurs when the sun's rays pass through water droplets in the atmosphere, thus creating a multicoloured arc that is visible to the human eye. Answer: (b) It bends towards the normal Answer: (b) dry forests
Scattering is the redirection of electromagnetic energy by suspended particles in the atmosphere.
Found inside – Page 70Explanation: The rainbow is formed when light at the inner surface of the water drop gets internally reflected. If the angle between the refracted ray and normal to the drop surface is greater than the critical angle. Q. 4. Which of the following statements is correct? (b) (I), (III) and (IV) The sun is visible to us 2 minutes before actual sunrise and 2 minutes after actual sunset due to the phenomenon of atmospheric refraction. (a) Cataract Fix a sheet of white paper on a drawing board using drawing pins. Select the row containing the correct marking of angles: Answer: Question 8. (b) the outer surface of the cornea light bend towards the normal line at different angles on entering prism. Answer: Answer: Found inside – Page 70Explanation: The rainbow is formed when light at the inner surface of the water drop gets internally reflected. If the angle between the refracted ray and normal to the drop surface is greater than the critical angle. Q. 4. (c) deserts (d) Reddish appearance of the Sun at the sunrise This discussion on formation of rainbow Related: Laws of Reflection, Light - Reflection and Refraction, Class 10 Science? Name the colours that suffer maximum and minimum deviation respectively while passing through a prism. ans.2-the formation of image of an object by a plane mirror is the phenomenon called as lateral inversion and reflection of light. Question 9. Class 10 Physics Human Eye and Colourful World. (II) A person with this defect has the near point greater than the least distance of distinct vision. (b) Red colour is absorbed more as compared to other colours Found inside – Page P-278Name the type of particles which acts as a prism in the formation of rainbow in the sky. R (1) Ans. . ... (ii) State the colours seen at X and Y. (iii) Why do different colours of white light bend at different angles through a prism? Refraction through a triangular prism. On a trip to a hill station, Raj was overjoyed to see such a beautiful sight of the sun just rising above the horizon! (b) excessive curvature of eye lens Question 27. a rainbow is always formed in a direction opp. Suggest corrections. Q. (Any two). Mark the angle of incidence (i), the angle of refraction (r) and the angle of emergence (e) as shown in Fig. (d) Both (III) and (IV) (a) (I), (II) and (III). Question 8.
Found inside – Page 230Explanation: The rainbow is formed when light at the inner surface of the water drop gets internally reflected. If the angle between the refracted ray and normal to the drop surface is greater than the critical angle. It is always formed in a direction opposite to that of the Sun. It should be raining. The correct observation is/are: [Diksha] The water droplets act like small prisms. (I) On entering prism, the Lightray bends towards its base. Get here a set of important questions for CBSE Class 10 Science Exam 2021. (IV) A person suffering from this defect may not see clearly beyond the near point. Found inside – Page 70Explanation: The rainbow is formed when light at the inner surface of the water drop gets internally reflected. If the angle between the refracted ray and normal to the drop surface is greater than the critical angle. Q. 4. This is how a rainbow is formed.In the formation of rainbow, when a ray of light falls on water drop, it undergoes refraction and dispersion to form a spectrum. After wearing the glasses, Piyush was now able to read the black board clearly and also got rid of his headaches.
The inner workings of the human eye are corn ple but at the same time, fascinating. (B) Mirages are more common in: Dispersion of White Light by a Glass Prism. (c) A person with myopia can see nearby objects clearly. Reason (R): Hotter air is optically denser and the cooler air is optically rarer. It is produced by dispersion of sunlight by tiny water droplets, present in the atmosphere. Thus, the primary rainbow is a result of three-step process, that is, refraction, reflection and refraction. Answer: Rainbow formation: A rainbow is a natural spectrum appearing in the sky after rain shower. Then he happens upon a vast body of water on the horizon. The same process causes white light to be broken into colors by a clear glass prism or a diamond. In the formation of the rainbow, the reflection process is responsible for the circular pattern, and the refraction process is responsible for the various colors of the rainbow. (c) The angle of refraction in glass is greater than the angle of incidence. Less scattering leads to the Sun appearing white as only a little of the blue and violet colour is scattered. Light undergoes refraction in the glass prism and bends away from the normal and hence EF is the refracted ray. Rainbows are formed by the dispersion of light & reflection (not total internal reflection) from drops of water. (III) Lightray suffers two refractions on passing through a prism and in each refraction it bends towards the base of the prism.
(III) A person suffering from this defect may see clearly upto a distance of a few metres. Raman is a keen observer and loved the spectacular colours in a rainbow. Mirage is observed mainly during sunny days when driving on a roadway. Obtain a sharp image of the circular hole on a screen (MN) using a second converging lens (Ly), as shown in Fig.
(c) Emergent ray and face AC of the prism Human Eye And Colourful World Class 10 MCQ With Answers Question 9. The doctor told his parents about the defect of vision that Piyush was suffering from and advised corrective glasses. List two essential conditions for observing a rainbow. (b) The refracting surfaces are inclined at an angle. (a) Both (I) and (II) Formation of Rainbow.
(a) Both (I) and (II) (a) rainforests Reason (R): The sun is near the horizon at sunrise and sunset and sunlight suffers atmospheric refraction. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. Answer:
(c) gets deviated and bends towards the thinner part of the prism. Explanation: Tyndall effect is shown by colloids and suspensions but not shown by true solutions. A rainbow is a meteorological phenomenon produced by the appearance of a spectrum of light in the sky. (a) Outer surface of the cornea. Can you explain this answer? (D) Why don’t planets twinkle? Found inside – Page 322(c) Draw a labelled ray diagram to show the formation of a rainbow. [CBSE Delhi 2017] Answers to Very Short Answer Questions 1. These muscles hold eye in position 2. Convex 3. A concave lens 4. A convex lens 5. Question 39.
(a) The different colours in the white light bend away from the normal line at different angles on entering prism. This is because the wavelength of red colour is the largest. A person suffering from this defect may see clearly upto a distance of a few metres. (d) Refraction, dispersion, reflection and refraction of light, Explanation: Rainbow is produced after the rain, by refraction, dispersion, total internal reflection and again refraction process in droplets of water. (b) Both (A) and (R) are true but (R) is not correct explanation of the (A). Class 10 Science Human Eye And Colourful World MCQ Question 21. . Answer: Class 10 Science Human Eye And Colourful World MCQ Question 21. Which of the following statements is correct? Sunny had also seen red lights on top of tall towers such as the Pitampura TV tower and even on top of the GSM towers.
(c) Both (II) and (IV) He guessed that it is due to the inclined refracting surfaces of a glass prism which is responsible for showing such exciting phenomenon. Answer: The Questions and (c) Near point = 0 m and far point = infinity RAINBOW FORMATION:- It is formed due to dispersion of light. Rainbows can be of full circles. Mirage is an example of total internal reflection which occurs due to atmospheric refraction. (d) (I) and (IV) only This gives rise to the reddish appearance of the Sun. (d) Blue colour is absorbed more as compared to other colours Answer: (A) The image formed by eye tens ¡s: Answer: During the experiment, to trace the path of ray of light through the glass prism, students reported the following observations: (c) blue colour is scattered the most Place a glass prism on it in such a way that it rests on its triangular base. 2. It means that the near point of his eyes has receded away. Answer: (C) The angle of deviation is the angle between: (b) is scattered the least by smoke or fog (a) A person with myopia can see distant objects clearly. Human Eye And Colourful World MCQ Question 2. Answer: MCQ Questions for Class 10 Science with Answers, Human Eye and Colourful World Class 10 MCQs Questions, MCQ Questions for Class 8 History Chapter 7 Weavers, Iron Smelters and Factory Owners with Answers, MCQ Questions for Class 8 History Chapter 12 India After Independence with Answers, MCQ Questions for Class 8 History Chapter 10 The Changing World of Visual Arts with Answers, MCQ Questions for Class 8 Civics Chapter 1 The Indian Constitution with Answers, MCQ Questions for Class 8 Civics Chapter 4 Understanding Laws with Answers, MCQ Questions for Class 8 History Chapter 8 Civilising the Native, Educating the Nation with Answers, MCQ Questions for Class 8 History Chapter 2 From Trade to Territory with Answers, MCQ Questions for Class 8 History Chapter 11 The Making of the National Movement 1870s-1947 with Answers, MCQ Questions for Class 8 History Chapter 5 When People Rebel 1857 and After with Answers, MCQ Questions for Class 8 Civics Chapter 2 Understanding Secularism with Answers, MCQ Questions for Class 8 History Chapter 4 Tribals, Dikus and the Vision of a Golden Age with Answers, (c) Fishes appear higher than their actual depth, (a) Converges a beam of light placed at S, (d) Converges a beam of light placed at S. Delicate membrane having Large number of Light-sensitive cells. Formation of Rainbow | V Shiksha | Class 10 | #shortsRefraction through prism https://youtu.be/px49KEDmgiMIonic Compoundshttps://youtu.be/NeibDhiFGo0Reaction with Acid \u0026 Reactivity Serieshttps://youtu.be/Of4jwPBv1h8Reaction with waterhttps://youtu.be/D0kyd7Ii1OoJoin V SHIKSHA NOWhttps://youtube.com/c/VShiksha21Metals and Non Metals Class 10 Chapter 3https://youtu.be/atpMXgb9FQ0Playlist Class 10MCQhttps://youtube.com/playlist?list=PLpQfjstOpvcMN18P9em9vVEZbWtAm7Rhttps://youtu.be/sFifhYDuiwEmH#shorts#vshiksha#youtubeupdate#viralvideo#trending#watchtime#vshiksha#vijender_singh,
Refraction through a triangular prism. As the focal length is negative, the lens is a concave lens. Hence, a rainbow is formed due to the refraction, dispersion and reflection of the sunlight that passes through the water droplets present in the atmosphere. Allow the beam of light to pass through a circular hole (c) made in a cardboard. Related Theory Why is a small amount of sodium thiosulphate added to water in tank in the activity to understand reddish appearance of sun at sunrise and sunset? (IV)Thin tens enables us to view distant objects clearly whereas thick lens enables us to see nearby objects clearly. What would have been the colour of sky if the earth had no atmosphere? Sodium thiosulphate is added to water in the tank for precipitating minute colloidal sulphur particles which scatter short wavelengths of Light. They noticed that all apartment buildings had red light installed at the terrace. (b) Both (I) and (IV) For its formation, there is need of sunlight in one part of the sky whereas, rain in the other side of the sky. Answer: Question 2. Explanation: As Piyush is suffering from myopia, a person with this defect has the far point nearer than infinity. Question bank for Class 10. Found inside – Page 99q Rainbow It is a natural spectrum appearing in the sky after a rain shower. It is caused by dispersion of sunlight by tiny water droplets, present in the atmosphere. q Conditions for the formation of rainbow are (i) The formation of ... The Formation of the Rainbow. Question 5. Dispersion of light in prism. Answer: (E) When starlight enters the earth’s atmosphere: (c) Sulphur particles start precipitating in about 2 to 3 minutes. Ans. (A) The phenomena that play a role in the formation of rainbow is: This splitting of the light ray occurs because of the different angles of bending for each colour. The phenomena that play a role in the formation of rainbow is: (a) Reflection and refraction of light (b) Refraction, absorption, dispersion and refraction of light (c) Dispersion, refraction and reflection of light (a) + 0.5 D Answer: Hence, the correct option is (a).
Answer: (B) Select the correct statements regarding the defect of vision Piyush was suffering from: The crystalline Lens mereLy provides the finer adjustment of focal length required to focus objects at different distances on the retina. After rain , there are many tiny droplets of water still in the air.
Prism & dispersion of light. rainbows are beautiful but how exactly do they form and why is always the red color on the outside and the violet on the inside and how far these rainbows formed these are some of the questions we'll try and answer in this video so imagine I'm standing here it's a beautiful day and I want to see a rainbow what do I need oh you might know we need sunlight you don't see rainbows at night so . CBSE Class 12 Physics, CBSE . If you're interested in learning how and why a rainbow is formed in the sky, read on for more detailed information on this topic. (c) Both (II) and (IV) (II) At the second refracting surface, light rays entered from air to glass. Near the horizon, most of the blue light and shorter wavelengths are scattered away by the particles. The line PE meets the boundary of the prism at point E. Similarly, join and produce the points R and S. Let these lines meet the boundary of the prism at E and F, respectively. An observer on the ground observes a half-circle of color with red being the color perceived on the outside or top of the bow. A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his textbook. read more. Answer: MCQ Of Human Eye Class 10 Question 10. Rainbow. The bluish colour of water in the deep sea is due to: formation of rainbow Related: Laws of Reflection, Light - Reflection and Refraction, Class 10 Science? (B) Name two observations which can be explained by the above phenomenon. His parents took him to the nearest clinic and the doctor referred him to the eye specialist. In this page, you can find CBSE Class 10 Science Chapter 11 Extra Questions and Answers Human Eye and Colourful World Pdf free download, NCERT Extra Questions for Class 10 Science will make your practice. The water droplets present in the sky act as tiny prisms, which refract and disperse sunlight, then reflect it internally and finally refract it again when it comes out of the raindrop. Found inside – Page 76Explanation: The rainbow is formed when light at the inner surface of the water drop gets internally reflected. If the angle between the refracted ray and normal to ... Oswaal CBSE Chapterwise Question Bank for Term-I, SCIENCE, Class – X. (b) Myopia He also observed the same pattern when he allowed sunlight to pass through a glass prism. Apart from that, it will also focus on studying these two . The ray FS is the emergent ray as light emerges out of the face AC of the prism along this direction. Sometimes, when you look at the sun . Nov 15,2021 - Which of the following phenomena of light are involved in the formation of a rainbow ?a)Reflection, refraction and dispersionb)Refraction, dispersion and scatteringc)Refraction, dispersion and internal reflectiond)Dispersion, scattering and refractionCorrect answer is option 'C'. Explanation: Hypermetropia or farsightedness can be corrected by using convex lens of appropriate power and myopia by a concave lens of appropriate power.
As focal length of the corrective lens is negative, the type of lens used is a concave lens. Found inside – Page 5-125.3(b) Formation of a primary rainbow In a primary rainbow, red color is on the outside of the arc and violet color is on theinside of the arc. The red rays appear to be coming from a water droplet which subtends an angle of 42oto the ... (d) Nature of Lens – Concave :Focal Length – 22.22 cm. Answer: ← Prev Question Next Question → 0 votes . (d) Refraction, dispersion, reflection and refraction of light This condition is known as hypermetropia or farsightedness. Answer: Question 10. Answer: (b) The different colours in the white Answer: Dispersion of White Light by a Glass Prism.
When a beam of light strikes these fine particles, the path taken by that beam becomes visible. The phenomenon involved in rainbow is refraction of light, dispersion of light, total internal reflection of light. (d) The different colours in the white light bend towards the normal at same speed to each other on entering prism. Found inside – Page 620But whether a rainbow is seen depends on the relative positions of the Sun and the observer. As you may have noticed, the Sun is generally behind you when you see a rainbow. To understand the formation and observation of a rainbow, ... (b) Of presence of dust particles in atmosphere 1. Answer: (a) Refraction of light Found inside – Page 418So, image of the object placed beyond 5 m from his eyes is formed in front of the retina and object appears blurred. ... A Sun B =– 15= Rain drop C Total internal reflection of spectrum Red D Refraction Violet Rainbow P – 0.2 D. Q. 6.
The fine particles in water scatter mainly blue light having the shortest wavelength. MCQ Questions for Class 10 Science Chapter 11 are very important for the latest CBSE term 1 and term 2 pattern.
(d) opaque eye Lens (a) denser medium Assertion (A): The sun’s disc appears to be flattened at sunrise and sunset. During this time when the sun is still below the horizon, the sun’s rays enter the earth’s atmosphere and undergo continuous refraction and bend towards the normal as the refractive index increases continuously as we reach the earth’s surface. It is caused when the crystalline lens of eye becomes milky andcloudy. (d) Presbyopia Here you get the CBSE Class 10 Science chapter 11, Human Eye and Colourful World: NCERT Exemplar Problems and Solutions (Part-I). Answer: Human Eye Class 10 MCQ Question 3. Join E and F. Draw perpendiculars to the refracting surfaces AB and AC of the prism at points E and F, respectively. (b) Both (I) and (IV) The red light has the maximum wavelength. Well, that is due to an optical illusion called Mirage. Question 2. The blue colour appears to be coming from the sky. A rainbow is most often viewed as a circular arc in the sky. Question 23. Reason (R): Blue colour in sunlight travelling through atmosphere undergoes maximum scattering. When a beam of light strikes these fine particles, the path taken by that beam becomes visible.
Blue colour has the least wavelength. (b) all the colours of the white light are scattered away