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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
Test Help For
  • CBSE Physics.
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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


1. 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 1 of 15

2. 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 2 of 15

3. For the given incident ray as shown in figure, teh condition of total internal reflection of the ray will be satisfied if the refractive index of block will be ?

Question 3 of 15

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

Question 4 of 15

5. The refractive index of the material of the prism is √3, then the angle of minimum deviation the prism is ?

Question 5 of 15

6. The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 A° is of the order of ?

Question 6 of 15

7. 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 7 of 15

8. A beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge from ?

Question 8 of 15

9. 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 9 of 15

10. A planoconvex lens is made of a material of refractive index μ = 1.5. The radius of curvature of curved surface of the lens is 20 cm. If its plane surface is silvered, the focal length of the silvered lens will be ?

Question 10 of 15

11. Diameter of human eye lens is 2 mm. What will be the minimum distance between two points to resolve them, which are situated at distance of 50 m from eye ? (the wavelength of light is 5000 A°) ?

Question 11 of 15

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

Question 12 of 15

13. Rainbows are formed by ?

Question 13 of 15

14. A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometer from two objects, which can be resolved buy the telescope, when the mean wavelength of light is 500 A°, is of the order of ?

Question 14 of 15

15. Colours of thin soap bubbles are due to ?

Question 15 of 15


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