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

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

Question # 2

Light has:

Question # 3

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

Question # 4

The wave nature of light was proposed by:

Question # 5

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

Question # 6

Laws of reflection and refraction can also be explained by:

Question # 7

Electromagnetic waves transport:

Question # 8

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

Question # 9

To sources are said to be coherent if they have:

Question # 10

The contrast in the fringes in an interference pattern depends upon

Question # 11

The locus of all points in a medium having same phase of vibration is called

Question # 12

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

Question # 13

Wave length of light, on the average, is given by:

Question # 14

Conventionally, all the distance p, q, f are measured from _____ of the lens:

Question # 15

Huygen principle is used to determine:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
2 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
3 A ray passing through optical center of a lens, after refraction:
A. Passes through focus
B. Go deviated
C. Retraces its path
D. Both B and C
4 The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
A. Greater than
B. Less than
C. Equal to
D. None of these
5 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
6 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
7 When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:
A. Greater, smaller
B. Smaller, smaller
C. Smaller, larger
D. Greater, larger
8 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
9 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
10 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these

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