Physics Optical Instruments Test Online Preparation Mcqs

Physics Optical Instruments Test Online Preparation Mcqs With Answers Start Below

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Question 1 of 15

1. If an object is placed away from ‘2f’ of a converting lens, then the image will be
A.
B.
C.
D.

Question 1 of 15

Question 2 of 15

2. Which one type of fibre is more suitable for transmission of signals in which white light is used?
A.
B.
C.
D.

Question 2 of 15

Question 3 of 15

3. Who invented photo phone?
A.
B.
C.
D.

Question 3 of 15

Question 4 of 15

4. A surf board moves at a aped of 5ms-1on the crests of the wave. The distance between wave crests is 10m. What is the frequency of the wave motion
A.
B.
C.
D.

Question 4 of 15

Question 5 of 15

5. Two convex lenses of equal focal length ‘f’ are placed in contact, the resultant focal length of the combination is
A.
B.
C.
D.

Question 5 of 15

Question 6 of 15

6. Dispersional effect may produce error in light signals. This type of error is minimum is
A.
B.
C.
D.

Question 6 of 15

Question 7 of 15

7. The equation αmin = 1.22 λ/D was devised by
A.
B.
C.
D.

Question 7 of 15

Question 8 of 15

8. A lens, which is thicker at the center and thinner at the edges, is called
A.
B.
C.
D.

Question 8 of 15

Question 9 of 15

9. A convex and concave lens of focal length ‘f’ are in contact. The focal length of the combination will be
A.
B.
C.
D.

Question 9 of 15

Question 10 of 15

10. The function of collimator in spectrometer is
A.
B.
C.
D.

Question 10 of 15

Question 11 of 15

11. If the red light is replaced by blue light illuminating the object in a microscope the resolving power of the microscope
A.
B.
C.
D.

Question 11 of 15

Question 12 of 15

12. If a convex lens of focal length ‘f’ is cut into two identical halves along the lens diameter, the focal length of each half is
A.
B.
C.
D.

Question 12 of 15

Question 13 of 15

13. A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called
A.
B.
C.
D.

Question 13 of 15

Question 14 of 15

14. The central image in compound microscope is
A.
B.
C.
D.

Question 14 of 15

Question 15 of 15

15. Light signals pass through multimode graded index fiber due to
A.
B.
C.
D.

Question 15 of 15


 

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