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

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

Question # 2

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

Question # 3

A virtual image is formed when object is placed:

Question # 4

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

Question # 5

To sources are said to be coherent if they have:

Question # 6

The cause of mirage observed in deserts in bright sunlight is due to

Question # 7

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

Question # 8

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

Question # 9

Light waves are:

Question # 10

The least distance of distinct vision is:

Question # 11

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

Question # 12

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

Question # 13

In order to get interference using two light rays

Question # 14

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 To observe interference of light, the condition, which must be met with is that the sources must be:
A. Monochromatic
B. Phase coherent
C. Both of above
D. None of above
3 The magnifier forms a virtual image of the object at:
A. None of these
B. Least distance of distinct vision
C. Much farther than the least distance
D. Both A and B are correct
4 Resolving power in mth order diffraction for grating is given by:
A. R = N x m
B. None of these
C. R = m/N
D. R = N/m
5 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
6 If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
7 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
8 Laws of reflection and refraction can also be explained by:
A. Particle nature of light
B. Quantum nature of light
C. Wave nature of light
D. Complex nature of light
9 Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:
A. 6 x 10-5rad
B. 7 x 10-5rad
C. 8 x 10-5rad
D. None of these
10 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these

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