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

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

Question # 2

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

Question # 3

Laws of reflection and refraction can also be explained by:

Question # 4

Speed of light in vacuum depends upon:

Question # 5

A ray passing through optical center of a lens, after refraction:

Question # 6

To sources are said to be coherent if they have:

Question # 7

The magnifier forms a virtual image of the object at:

Question # 8

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

Question # 9

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 # 10

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

Question # 11

Huygen's principles states that:

Question # 12

Huygen's theory cannot explain

Question # 13

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

Question # 14

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

Question # 15

A prism splits a beam of white light into seven component colors. This is so because

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
3 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
4 Light appears to travel in straight line because
A. It is not absorbed by the atmosphere
B. It is refracted by the atmosphere
C. Its wavelength is very small
D. Its velocity is very large
5 A prism splits a beam of white light into seven component colors. This is so because
A. Phase of different colors is different
B. Amplitude of different colors is different
C. Wavelength of different colors is different
D. Velocity of different colors is different
6 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
7 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
8 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
9 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
10 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect

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