Physics: Optics
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Avg score: 33% • Most missed: “Large astronomical telescopes always use as objective”
Physics: Optics
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23 Questions

1. The refractive index of the material of a glass prism depends upon
2. The critical angle for a transport solid is 30°. Then its refractive index is
3. What causes changes in the colours of the soap or oil films for the given beam of light?
4. To increase the magnifying power of telescope, we should increase
5. A concave mirror produces a real, inverted image of the same size of the object. Then, the object is at a distance
6. What causes changes in the colours of the soap or oil films for the given beam of light?
7. The colour of the ocean appears blue because the sunlight falling on it is
8. A man wearing spectacles, when working with a microscope
9. An object is placed at a distance equal to the focal length of convex mirror. If the focal length of the mirror be f, then the distance of the image from the pole of the mirror is
10. A rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena is responsible for this? (1) Diffusion (2) Refraction (3) Internal reflection
11. If a real object is placed just inside the focal point of a diverging lens, the image is
12. An object is placed at a distance equal to the focal length of convex mirror. If the focal length of the mirror be f, then the distance of the image from the pole of the mirror is
13. A concave mirror produces a real, inverted image of the same size of the object. Then, the object is at a distance
14. The speed of light in water is ¾ of that in air. What is the refractive index of water?
15. The angle of minimum deviation of an equiangular prism, having a refractive index of 1.732 is
16. A rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena is responsible for this? (1) Diffusion (2) Refraction (3) Internal reflection
17. Blue of the sky is due to the
18. The angle of minimum deviation of an equiangular prism, having a refractive index of 1.732 is
19. Mirage is due to
20. Blue of the sky is due to the
21. Large astronomical telescopes always use as objective
22. The speed of light in water is ¾ of that in air. What is the refractive index of water?
23. The mirage is seen in a hot desert because of

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