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

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

Question # 2

Huygen's theory cannot explain

Question # 3

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

Question # 4

The velocity of light in vacuum can be changed by changing

Question # 5

Light waves are:

Question # 6

The image of the tip of a needle is never sharp because of

Question # 7

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:

Question # 8

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

Question # 9

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

Question # 10

Light appears to travel in straight line because

Question # 11

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

Question # 12

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

Question # 13

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:

Question # 14

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
2 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
3 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
4 Frequency of red color as compared to that of violet color is:
A. Equal
B. Smaller
C. Greater
D. None of these
5 To see the minor details of the object by microscope, it should have:
A. High magnifying power
B. High resolving power
C. Am objective of larger focal length
D. None of these
6 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
7 Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
A. Gamma rays, micro waves, visible light
B. Radio waves, ultraviolet waves, X-rays
C. Ultraviolet rays, infrared rays, micro waves
D. Visible light, gamma rays, radio waves
8 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
9 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
10 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them

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