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

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

Question # 2

The velocity of light in vacuum can be changed by changing

Question # 3

The image of the tip of a needle is never sharp because of

Question # 4

A line which represents the direction of travel of a wave is known as:

Question # 5

With age, least distance of distinct vision:

Question # 6

If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:

Question # 7

When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

Question # 8

Wave length of that color as compared to that of violet color is:

Question # 9

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

Question # 10

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

Question # 11

According to Huygen's principle

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
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 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 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
8 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
9 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Smaller
B. Larger
C. Zero
D. None of these
10 The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
A. Diffraction
B. Interference
C. Polarization
D. Dispersion

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