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

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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

The appearance of the colour in the soap (oil) film results from:

Question # 6

The magnifier forms a virtual image of the object at:

Question # 7

When the object lies between F and 2F, the image formed by is formed at:

Question # 8

The distance from eye to near point is taken as:

Question # 9

In the formula R = N x m for diffraction grating, N denotes:

Question # 10

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

Question # 11

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

Question # 12

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

Question # 13

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Question # 14

The locus of all points in a medium having same phase of vibration is called

Question # 15

Light has:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
2 A ray passing through optical center of a lens, after refraction:
A. Passes through focus
B. Go deviated
C. Retraces its path
D. Both B and C
3 The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.
A. Equal to
B. Greater than
C. Smaller than
D. None of these
4 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
5 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
6 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
7 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
8 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
9 The magnifier forms a virtual image of the object at:
A. None of these
B. Both A and B are correct
C. Much farther than the least distance
D. Least distance of distinct vision
10 The image of the tip of a needle is never sharp because of
A. Polarization of light
B. Interference of light
C. Diffraction of light
D. Reflection of light

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