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

The distance from eye to near point is taken as:

Question # 2

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

Question # 3

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

Question # 4

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

Question # 5

When a source of light isat very large distance,the shape of wavefront is:

Question # 6

The contrast in the fringes in an interference pattern depends upon

Question # 7

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

Question # 8

Light has:

Question # 9

A virtual image is formed when object is placed:

Question # 10

Huygen's principles states that:

Question # 11

Frequency of red color as compared to that of violet color is:

Question # 12

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

Question # 13

Stars twinkle due to

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
2 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
3 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
4 A convex lens acts as diverging lens when the object is placed:
A. Between F and 2F
B. At 2F
C. With focal length
D. Beyond 2F
5 In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
A. Greater than
B. Equal to
C. Smaller than
D. None of these
6 According to Huygen's principle
A. light travels in straight line
B. Light is a transvers wave
C. Light has dual nature
D. All points on the primary wave-front are the sources of secondary wavelets
7 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
8 The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
A. Greater than
B. Less than
C. Equal to
D. None of these
9 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
10 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct

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