ECAT Pre Computer Science Chapter 9 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 9 Physical Optics

Try The MCQ's Test For ECAT Physics Chapter 9 Physical Optics

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ECAT Physics Chapter 9 Physical Optics

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Question # 1

The least distance of distinct vision is:

Question # 2

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

Question # 3

Laws of reflection and refraction can also be explained by:

Question # 4

The locus of all points in a medium having same phase of vibration is called

Question # 5

Light has:

Question # 6

The velocity of light in vacuum can be changed by changing

Question # 7

A ray passing through optical center of a lens, after refraction:

Question # 8

Resolving power in mth order diffraction for grating is given by:

Question # 9

Electromagnetic waves transport:

Question # 10

A convex lens acts as diverging lens when the object is placed:

Question # 11

A grating with high resolving power can distinguish _______ difference in wavelengths :

Question # 12

For the virtual image, option _______ is not correct:

Question # 13

Wave length of that color as compared to that of violet color is:

Question # 14

Conventionally, all the distance p, q, f are measured from _____ of the lens:

Question # 15

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
2 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
3 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
4 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
5 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
6 In the formula R = N x m for diffraction grating, N denotes:
A. No. of lines/cm
B. No. of lines/meter
C. Total number of lines
D. None of above
7 Light appears to travel in straight line because
A. It is not absorbed by the atmosphere
B. It is refracted by the atmosphere
C. Its wavelength is very small
D. Its velocity is very large
8 How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
A. The upper half of the image is cut off
B. The brightness of the image is reduced
C. The brightness of the image is increased
D. No effect at all
9 In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.
A. Bright
B. Dark
C. Any of A and B
D. None of these
10 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm

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