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 Test Help For CBSE Physics. CBSE Board Exams. Entrance Exams. Admissions Test. Jobs Test. General Knowledge. All Grades Exams.

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

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

Question 1 of 15

2. 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 2 of 15

3. 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 3 of 15

4. 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 4 of 15

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

Question 5 of 15

6. 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 6 of 15

7. A body is located on a wall. Its image of equal size is to be obtained on a parallel wall with the help of a convex lens. The lens is placed at a distance d ahead of second wall. then the required focal length will be ?

Question 7 of 15

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

Question 8 of 15

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

Question 9 of 15

10. 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 10 of 15

11. 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 11 of 15

12. A man is 6 ft tall. In order to see his entire image, he requires a plane mirror of minimum length equal to ?

Question 12 of 15

13. 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 13 of 15

14. 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 14 of 15

15. 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 15 of 15

 Test By Subject CBSE Test By Topics Ray Optics and Optical Instruments