ECAT Pre Engineering Physics Chapter 9 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Question # 1

The magnifier forms a virtual image of the object at:

Question # 2

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

Question # 3

According to Huygen's principle

Question # 4

Electromagnetic waves transport:

Question # 5

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

Question # 6

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

Question # 7

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

Question # 8

Huygen's principles states that:

Question # 9

Least distance of distinct vision of an old man possibly becomes:

Question # 10

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

Question # 11

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

Question # 12

To sources are said to be coherent if they have:

Question # 13

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

Question # 14

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 # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
2 The property of light which does not change with the nature of the medium is:
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
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 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
5 The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
A. 1
B. 0.2
C. 2
D. 0.1
6 Resolving power in mth order diffraction for grating is given by:
A. R = N/m
B. R = m/N
C. R = N x m
D. None of these
7 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
8 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
9 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
10 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted

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