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

In case of point, source of light shape of wavefront is:

Question # 2

The terms phase difference and path difference are:

Question # 3

The least distance of distinct vision is:

Question # 4

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

Question # 5

The focal length of convex lens having magnifying power of 5.55 is:

Question # 6

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

Question # 7

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 # 8

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

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

A line which represents the direction of travel of a wave is known as:

Question # 11

The property of light which does not change with the nature of the medium is:

Question # 12

Light waves are:

Question # 13

For the virtual image, option _______ is not correct:

Question # 14

When a source of light isat very large distance,the shape of wavefront is:

Question # 15

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:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 In order to get interference using two light rays
A. The sources should be monochromatic and coherent
B. The sources should have the same frequency
C. Superposition should be linear
D. All of these
2 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
3 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
4 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
5 The locus of all points in a medium having same phase of vibration is called
A. Crest
B. Trough
C. Wavelength
D. Wave-front
6 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
7 If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
8 The contrast in the fringes in an interference pattern depends upon
A. Fringe width
B. Relative difference intensities of the two sources
C. Distance between the slits
D. Wavelength
9 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
10 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these

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