CBSE Physics Ray Optics and Optical Instruments Test 1 Online Mcqs Queston Answer
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CBSE Physics Ray Optics and Optical Instruments Test 1 Online

Test Name Ray Optics and Optical Instruments Test
Subject CBSE Physics
Test Type MCQs
Total Question 25
Total Marks 50
Total Time 20 Minutes
Test Help For
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Central Board of Secondary Education, CBSE is main Board of Education in India to control all educational institutes Classes wise,  Physics all grades chapter wise test coverage guided material arrange in these test. Today our topic is Ray Optics and Optical Instruments test to prepare through recent syllabus. Electromagnetic Field that propagates through space carries a radiant energy. This energy can be divided into 7 radiation namely radio Waves, Micro Waves, Infrared, Visible Lights, Ultraviolet, X-Ray and Gamma Rays based on their wavelength. Take online quiz test for prepare more your knowledge about these fields.

CBSE Physics Ray Optics and Optical Instruments Test 1 Online


1. Angle of deviation (∂) by prism (refractive index = μ, and supposing the angle of prism A to be small) can be given by ?

Question 1 of 15

2. A beam of monochromatic light is refracted from vacuum into a medium of refractive index 1.5. The wavelength of refracted light will be ?

Question 2 of 15

3. Interference is possible in ?

Question 3 of 15

4. An achromatic combination of lenses is formed by joining ?

Question 4 of 15

5. A ray is incident at an angle of incidence i on one surface of prism of small angle A and emerge normally from opposite surface. If the refractive index of the material of prism is μ, the angle of incidence i is nearly equal to ?

Question 5 of 15

6. A convex lens of focal length 80 cm and a concave lens of focal length 50 cm are combined together. What will be their resulting power ?

Question 6 of 15

7. Focal length of a convex lens will be maximum for ?

Question 7 of 15

8. If fv and fR are the focal lengths of a convex lens for violet and red light respectively and Fv and FR are the focal lengths of concave lens for violet and red light respectively, then we have ?

Question 8 of 15

9. Electromagnetic radiation of frequency v frequency, velocity v and wavelength λ, in air enters a glass slab of refractive index μ. The frequency, wavelength and velocity of light in the glass slab will be respectively ?

Question 9 of 15

10. Time taken by sunlight to pass through a widow of thickness 4 mm whose refractive index is 3/2 is ?

Question 10 of 15

11. Light travels through a glass plate of thickness t and refractive index μ. If c is the speed of light in vacuum, the time taken by light to travel this thickness of glass is ?

Question 11 of 15

12. Which of the following phenomenon is not common to sound and light waves ?

Question 12 of 15

13. A lens is placed between a source of light and a wall. It forms images of area A1 and A2 on the wall, for its two different positions, the area of the source of light is ?

Question 13 of 15

14. There is a prism with refractive index equal to √2and the refracting angle equal to 30°. One of the refracting surface of the prism is polished. A beam of monochromatic will retrace its path if its angle of incidence over the refracting surface of the prism is ?

Question 14 of 15

15. The focal lengths of a converging lens measured for violet, green and red colours are fV, fG, fR respectively. We will find

Question 15 of 15


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