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

00:00
Question # 1

Monochromatic light means waves of:

Question # 2

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

Question # 3

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

Question # 4

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 # 5

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

Question # 6

Conventionally, all the distance p, q, f are measured from _____ of the lens:

Question # 7

In the formula R = N x m for diffraction grating, N denotes:

Question # 8

The distance from eye to near point is taken as:

Question # 9

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

Question # 10

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

Question # 11

According to Huygen's principle

Question # 12

Laws of reflection and refraction can also be explained by:

Question # 13

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

Question # 14

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

Question # 15

Electromagnetic waves transport:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
A. The upper half of the image is cut off
B. The brightness of the image is reduced
C. The brightness of the image is increased
D. No effect at all
3 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
4 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
5 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
6 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
7 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
8 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
9 The locus of all the points in the same phase of vibration is called:
A. Wave packet
B. Wave front
C. Wave number
D. None of them
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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