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

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

Question # 2

Stars twinkle due to

Question # 3

Light has:

Question # 4

The magnifier forms a virtual image of the object at:

Question # 5

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

Question # 6

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

Question # 7

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Question # 8

In case of point, source of light shape of wavefront is:

Question # 9

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

Question # 10

According to Huygen's principle

Question # 11

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:

Question # 12

The distance from eye to near point is taken as:

Question # 13

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 # 14

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 # 15

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
2 For the virtual image, option _______ is not correct:
A. 1/p = 1/f -1/q
B. 1/f = 1/p -1/q
C. 1/p=1/p-1/f
D. 1/p=1/f+1/q
3 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
4 The locus of all the points in the same phase of vibration is called:
A. Wave packet
B. Wave front
C. Wave number
D. None of them
5 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
6 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
7 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
8 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
9 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
10 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m

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