ECAT Pre Engineering Physics Chapter 9 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Question # 1

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

Question # 2

The magnifier forms a virtual image of the object at:

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

To see the minor details of the object by microscope, it should have:

Question # 8

The locus of all the points in the same phase of vibration is called:

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

Huygen's principles states that:

Question # 11

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

Question # 12

The size of the image is maximum when its distance from the magnifying glass is:

Question # 13

The contrast in the fringes in an interference pattern depends upon

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 In case of point, source of light shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
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 In order to get interference using two light rays
A. The sources should be monochromatic and coherent
B. The sources should have the same frequency
C. Superposition should be linear
D. All of these
4 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
5 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
6 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
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 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
9 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
10 In the formula R = N x m for diffraction grating, N denotes:
A. No. of lines/cm
B. No. of lines/meter
C. Total number of lines
D. None of above

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