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

00:00
Question # 1

Huygen's principles states that:

Question # 2

Huygen principle is used to determine:

Question # 3

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

Question # 4

For the virtual image, option _______ is not correct:

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

The velocity of light in vacuum can be changed by changing

Question # 9

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Question # 10

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

Question # 11

The magnifier forms a virtual image of the object at:

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Resolving power in mth order diffraction for grating is given by:
A. R = N/m
B. R = m/N
C. R = N x m
D. None of these
2 How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
A. The upper half of the image is cut off
B. The brightness of the image is reduced
C. The brightness of the image is increased
D. No effect at all
3 When a source of light isat very large distance,the shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
4 To sources are said to be coherent if they have:
A. Same amplitude
B. Same wavelength
C. Definite phase relation with each other
D. None of them
5 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
6 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
7 The size of the image is maximum when its distance from the magnifying glass is:
A. 0.10 m
B. 0.15 m
C. 0.20 m
D. 0.25 m
8 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
9 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
10 To see the minor details of the object by microscope, it should have:
A. High magnifying power
B. High resolving power
C. Am objective of larger focal length
D. None of these

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