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

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

Question # 3

Huygen's principles states that:

Question # 4

Laws of reflection and refraction can also be explained by:

Question # 5

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

Question # 6

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

Question # 7

The ratio of the size of the image to that of object is called:

Question # 8

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

Question # 9

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

Question # 10

Angle between the ray of light and the corresponding wavefront is:

Question # 11

According to Huygen's principle

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

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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 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
3 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
4 If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
A. Fringe width will decrease
B. Fringe width will increase
C. Fringe width will remain unchanged
D. Fringe will become less intense
5 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
6 The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
A. Diffraction
B. Interference
C. Polarization
D. Dispersion
7 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
8 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
9 The size of the image is maximum when its distance from the magnifying glass is:
A. 0.10 m
B. 0.15 m
C. 0.20 m
D. 0.25 m
10 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these

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