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

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

Question # 3

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

Question # 4

The velocity of light in vacuum can be changed by changing

Question # 5

Electromagnetic waves transport:

Question # 6

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

Question # 7

For the virtual image, option _______ is not correct:

Question # 8

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 # 9

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

Question # 10

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 # 11

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

Question # 12

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

Question # 13

The distance from eye to near point is taken as:

Question # 14

The contrast in the fringes in an interference pattern depends upon

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 A virtual image is formed when object is placed:
A. Within focal length of a convex lens
B. Near the focal point of a concave lens
C. Both A and B
D. Away from 2F of a convex lens
2 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
3 In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
A. Greater than
B. Smaller than
C. Equal to
D. None of these
4 To sources are said to be coherent if they have:
A. Same amplitude
B. Same wavelength
C. Definite phase relation with each other
D. None of them
5 The magnifier forms a virtual image of the object at:
A. None of these
B. Least distance of distinct vision
C. Much farther than the least distance
D. Both A and B are correct
6 Which one of the following can act approximately as a source of monochromatic light;
A. Neon lamp
B. Fluorescent tube
C. Sodium lamp
D. None of these
7 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
8 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
9 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
10 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

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