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

Light waves are:

Question # 2

The magnifier forms a virtual image of the object at:

Question # 3

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

Question # 4

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

Question # 5

Light has:

Question # 6

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

Question # 7

To sources are said to be coherent if they have:

Question # 8

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

Question # 9

Angle between the ray of light and the corresponding wavefront is:

Question # 10

Monochromatic light means waves of:

Question # 11

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

Question # 12

The magnifier forms a virtual image of the object at:

Question # 13

Huygen's principles states that:

Question # 14

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

Question # 15

A magnifier gives an image which is:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
2 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
3 The focal length of convex lens having magnifying power of 5.55 is:
A. 5.5 cm
B. 5 cm
C. 4.5 cm
D. 6 cm
4 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
5 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
6 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
7 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
8 Stars twinkle due to
A. The fact that they do not emit light continuously
B. The refractive index of earth's atmosphere fluctuates
C. The Star's atmosphere absorbs its light intermittently
D. None of these
9 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
10 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

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