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

Light appears to travel in straight line because

Question # 2

When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

Question # 3

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

Question # 4

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

Question # 5

The least distance of distinct vision is:

Question # 6

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

Question # 7

When the object lies between F and 2F, the image formed by is formed at:

Question # 8

Frequency of red color as compared to that of violet color is:

Question # 9

When the object lies between F and 2F, the image formed by is formed at:

Question # 10

To observe interference of light, the condition, which must be met with is that the sources must be:

Question # 11

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

Question # 12

The magnifier forms a virtual image of the object at:

Question # 13

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

Question # 14

In an interference pattern of Young's double slit(YDS) experiment:

Question # 15

In order to get interference using two light rays

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
A. Greater than
B. Equal to
C. Smaller than
D. None of these
2 Resolving power in mth order diffraction for grating is given by:
A. R = N x m
B. None of these
C. R = m/N
D. R = N/m
3 Which one of the following can act approximately as a source of monochromatic light;
A. Neon lamp
B. Fluorescent tube
C. Sodium lamp
D. None of these
4 A virtual image is formed when object is placed:
A. Within focal length of a convex lens
B. Near the focal point of a concave lens
C. Both A and B
D. Away from 2F of a convex lens
5 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
6 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
7 The locus of all the points in the same phase of vibration is called:
A. Wave packet
B. Wave front
C. Wave number
D. None of them
8 For the virtual image, option _______ is not correct:
A. 1/p = 1/f -1/q
B. 1/f = 1/p -1/q
C. 1/p=1/p-1/f
D. 1/p=1/f+1/q
9 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
10 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

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