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

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

Question # 2

The locus of all the points in the same phase of vibration is called:

Question # 3

Electromagnetic waves transport:

Question # 4

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 # 5

The focal length of convex lens having magnifying power of 5.55 is:

Question # 6

With age, least distance of distinct vision:

Question # 7

Huygen's principles states that:

Question # 8

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

Question # 9

A prism splits a beam of white light into seven component colors. This is so because

Question # 10

The wave nature of light was proposed by:

Question # 11

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

Question # 12

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

Question # 13

The velocity of light in vacuum can be changed by changing

Question # 14

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

Question # 15

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All 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 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
4 The magnifier forms a virtual image of the object at:
A. None of these
B. Both A and B are correct
C. Much farther than the least distance
D. Least distance of distinct vision
5 A prism splits a beam of white light into seven component colors. This is so because
A. Phase of different colors is different
B. Amplitude of different colors is different
C. Wavelength of different colors is different
D. Velocity of different colors is different
6 The ratio of the size of the image to that of object is called:
A. Focal length
B. Aperture
C. Linear magnification
D. Principal axis
7 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
8 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
9 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
10 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these

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