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

For the virtual image, option _______ is not correct:

Question # 2

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

Question # 3

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

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

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

Question # 6

The wave nature of light was proposed by:

Question # 7

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

Question # 8

Stars twinkle due to

Question # 9

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

Question # 10

To observe interference of light, the condition, which must be met with is that the sources must be:

Question # 11

The contrast in the fringes in an interference pattern depends upon

Question # 12

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

Question # 13

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

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

Wave length of light, on the average, is given by:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The size of the image is maximum when its distance from the magnifying glass is:
A. 0.10 m
B. 0.15 m
C. 0.20 m
D. 0.25 m
2 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
3 If the object is situated at focus of a convex lens, then its image is formed at:
A. F
B. 2F
C. Infinity
D. None of these
4 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
5 The cause of mirage observed in deserts in bright sunlight is due to
A. Refraction of light
B. Reflection of light
C. Scattering of light
D. Total internal reflection of light
6 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
7 A line which represents the direction of travel of a wave is known as:
A. Spherical Wavefront
B. Locus
C. Ray
D. Either B or C
8 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
9 Which one of the following phenomenon cannot be explained on the bases of Huygen's theory
A. Refraction
B. Reflection
C. Diffraction
D. Formation of spectrum
10 If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
A. Fringe width will decrease
B. Fringe width will increase
C. Fringe width will remain unchanged
D. Fringe will become less intense

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