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

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

Question # 2

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

Question # 3

A magnifier gives an image which is:

Question # 4

Light appears to travel in straight line because

Question # 5

Which one of the following can act approximately as a source of monochromatic light;

Question # 6

Light waves are:

Question # 7

If the object is situated at focus of a convex lens, then its image is formed at:

Question # 8

The contrast in the fringes in an interference pattern depends upon

Question # 9

With age, least distance of distinct vision:

Question # 10

Huygen's theory cannot explain

Question # 11

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

Question # 12

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

Question # 13

Stars twinkle due to

Question # 14

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

Question # 15

The size of the image is maximum when its distance from the magnifying glass is:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
2 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
3 The image of the tip of a needle is never sharp because of
A. Polarization of light
B. Interference of light
C. Diffraction of light
D. Reflection of light
4 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
5 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
6 A ray passing through optical center of a lens, after refraction:
A. Passes through focus
B. Go deviated
C. Retraces its path
D. Both B and C
7 Least distance of distinct vision of an old man possibly becomes:
A. A little less than 25 cm
B. A little more than 25 cm
C. Much less than 25 cm
D. None of these
8 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
9 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
10 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller

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