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CTET Prep: Science Questions - Physics - Light
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Light or visible light is electromagnetic radiation that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres, corresponding to frequencies of 750–420 terahertz, between the infrared and the ultraviolet.

CTET Prep: Science Questions - Physics - Light
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25 Questions

1. Chromatic aberration in a lens is caused by
2. The focal length of a convex lens is 50 cm. Its power is
3. Consider the following statements:
1. If magenta and yellow coloured circles intersect, the intersected area will have red colour.
2. If cyan and magenta coloured circles intersect, the intersected area will have blue colour. Which of the statements given above is/are correct ?
4. Two plane mirrors are inclined at 70°. A ray incident on one mirror at angle q. After reflection, falls on the second mirror and is reflected from there parallel to the first mirror q is
5. Mirage is observed in a desert due to the phenomenon of
6. The angle of elevation of a cloud is 30°. A thunder is heard 4 seconds after the lightening is observed. What is the vertical height of the cloud (speed of sound is 300 m/s)?
7. In vacuum the speed of light depends upon
8. An endoscope is employed to view the internal parts of the body organ. It is based on the principle of
9. Which of the following produce a virtual image smaller in size than the object?
10. A far-sighted person has a near point at 100 cm. What must be the power of the correcting lens?
11. The refractive index of a piece of transparent quartz is the greatest for
12. Wave nature of light follows because
13. Which one among the following has the highest energy?
14. Myopia is due to
15. Two sources of wave are called coherent if
16. When a CD (compact disc used in audio and video systems) is seen in sunlight. Rainbow like colours are seen. This can be explained on the basis of the phenomenon of
17. A part of the eye which helps in changing the focal length of crystalline lens is
18. A lens, immersed in a liquid becomes invisible when
19. An observer moves towards a plane mirror with a speed of 2 m/s. The speed of the image with respect to the observer is
20. A convex lens made of a material of refractive index 1.5 and having a focal length of 10 cm is immersed in a liquid of refractive index 3.0. The lens will behave as a
21. The magnifying power of a compound microscope increases when
22. Check the wrong statement (s)
23. A person cannot see clearly objects at a distance less than 100 cm. The power of the spectacles required to see clearly objects at 25 cm is
24. To obtain a sustained interference pattern, we require two sources which emit radiation of
25. A well cut diamond appears bright because

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