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

Huygen's principles states that:

Question # 2

The terms phase difference and path difference are:

Question # 3

Speed of light in vacuum depends upon:

Question # 4

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

Question # 5

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

Question # 6

The least distance of distinct vision is:

Question # 7

In order to get interference using two light rays

Question # 8

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

Question # 9

The locus of all the points in the same phase of vibration is called:

Question # 10

The contrast in the fringes in an interference pattern depends upon

Question # 11

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

Question # 12

Wave length of light, on the average, is given by:

Question # 13

Least distance of distinct vision of an old man possibly becomes:

Question # 14

The appearance of the colour in the soap (oil) film results from:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Smaller
B. Larger
C. Zero
D. None of these
2 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
3 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
4 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
5 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
6 A prism splits a beam of white light into seven component colors. This is so because
A. Phase of different colors is different
B. Amplitude of different colors is different
C. Wavelength of different colors is different
D. Velocity of different colors is different
7 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
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 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
10 If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:
A. Double the size
B. Same size
C. Half the size
D. None of these

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