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

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

Question # 2

For the virtual image, option _______ is not correct:

Question # 3

Light appears to travel in straight line because

Question # 4

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

Question # 5

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

Question # 6

The wave nature of light was proposed by:

Question # 7

The terms phase difference and path difference are:

Question # 8

To sources are said to be coherent if they have:

Question # 9

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:

Question # 10

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

Question # 11

A convex lens acts as diverging lens when the object is placed:

Question # 12

In order to get interference using two light rays

Question # 13

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

Question # 14

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

Question # 15

If the object is situated at focus of a convex lens, then its image is formed at:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
2 The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
A. 1
B. 0.2
C. 2
D. 0.1
3 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
4 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
5 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
6 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
7 Which one of the following can act approximately as a source of monochromatic light;
A. Neon lamp
B. Fluorescent tube
C. Sodium lamp
D. None of these
8 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
9 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
10 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these

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