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

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 # 2

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

Question # 3

Stars twinkle due to

Question # 4

Huygen's principles states that:

Question # 5

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

Question # 6

Least distance of distinct vision of an old man possibly becomes:

Question # 7

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

Question # 8

The terms phase difference and path difference are:

Question # 9

For the virtual image, option _______ is not correct:

Question # 10

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 # 11

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

Question # 12

Monochromatic light means waves of:

Question # 13

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

Question # 14

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

Question # 15

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:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 Laws of reflection and refraction can also be explained by:
A. Particle nature of light
B. Quantum nature of light
C. Wave nature of light
D. Complex nature of light
3 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
4 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
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 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
7 The image of the tip of a needle is never sharp because of
A. Polarization of light
B. Interference of light
C. Diffraction of light
D. Reflection of light
8 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
9 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
10 The magnifier forms a virtual image of the object at:
A. None of these
B. Least distance of distinct vision
C. Much farther than the least distance
D. Both A and B are correct

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