CBSE Physics Ray Optics and Optical Instruments Test 2 Online Mcqs Question Answers
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CBSE Physics Ray Optics and Optical Instruments Test 2 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
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Central Board of Secondary Education, CBSE is main Board of Education in India for control all Classes exams subject wise, Physics all grades chapter wise test coverage guided material arrange in these test. Our preparation topic of Ray Optics and Optical Instruments Physics subject complete material helpful for students.

CBSE Physics Ray Optics and Optical Instruments Test 2 Online

CBSE

1. Light enters at an angle of incidence in a transparent rod of refractive index. For what value of the refractive index of the material of the rod the light once entered into it will not leave it through its lateral face whatsoever be the value of angle of incidence ?

Question 1 of 15

2. Two thin lenses of focal lengths f1 and f2 are in contact and coaxial. The power of the combination is ?

Question 2 of 15

3. A transparent cube contains a small air bubble. It apparent distance is 2 cm when seen through one face and 5 cm when seen through other face. If the refractive index of the material of the cube is 1.5, the real length of the edge of cube must be ?

Question 3 of 15

4. The frequency of a light wave in a material is 2 x 1014 Hz and wavelength is 500 A.° The refractive index of material will be ?

Question 4 of 15

5. The wavelength of light of frequency 100 Hz is ?

Question 5 of 15

6. A small coin is resting on the bottom of a beaker filled with a liquid. A ray of light from the coin travels upto the surface of the liquid and move along its surface. How fast is the light travelling in the liquid ?

Question 6 of 15

7. The refractive index of the material of a prism is √2 and its refracting angle is 30°. One of the refracting surfaces of the prism is made a mirror inwards. A beam of monochromatic light entering the prism from the other face will retrace its path after reflection from the mirrored surface, if its angle of incidence on the prism is ?

Question 7 of 15

8. Rainbows are formed by ?

Question 8 of 15

9. A convex lens and a concave lens, each having same focal length of 25 cm, are put in contact to from a combination of lenses. The power in diopters of the combination is ?

Question 9 of 15

10. Transmission of light in optical fibre is due to ?

Question 10 of 15

11. Which of the following phenomena exhibits particles nature of light ?

Question 11 of 15

12. A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will ?

Question 12 of 15

13. A microscope is focused on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1.5 is placed over the mark. How should the microscope be moved to get the mark in focus again ?

Question 13 of 15

14. A planoconvex lens is made of material of refractive index 1.6. The radius of curvature of the curved surface is 60 cm. The focal length of the lens is ?

Question 14 of 15

15. An equiconvex lens is cut into two halves along (i) X)X' and (ii) YOY' as shown in the figure. Let f, f', f' 'be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii), respectively. Choose the correct statement from the following ?

Question 15 of 15


 

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