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

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

Question # 2

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

Question # 3

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

Question # 4

Light has:

Question # 5

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 # 6

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

Question # 7

Laws of reflection and refraction can also be explained by:

Question # 8

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

Question # 9

Stars twinkle due to

Question # 10

The distance from eye to near point is taken as:

Question # 11

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

Question # 12

Which one of the following can act approximately as a source of monochromatic light;

Question # 13

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

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

A virtual image is formed when object is placed:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 A convex lens acts as diverging lens when the object is placed:
A. Beyond 2F
B. At 2F
C. With focal length
D. Between F and 2F
2 A virtual image is formed when object is placed:
A. Within focal length of a convex lens
B. Near the focal point of a concave lens
C. Both A and B
D. Away from 2F of a convex lens
3 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
4 In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.
A. Bright
B. Dark
C. Any of A and B
D. None of these
5 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
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 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
8 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
9 In case of point, source of light shape of wavefront is:
A. Spherical
B. Cylindrical
C. Plane
D. None of these
10 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

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