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

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

Question # 3

A line which represents the direction of travel of a wave is known as:

Question # 4

Light appears to travel in straight line because

Question # 5

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

Question # 6

When a source of light isat very large distance,the shape of wavefront is:

Question # 7

Huygen's principles states that:

Question # 8

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

Question # 9

Frequency of red color as compared to that of violet color is:

Question # 10

A virtual image is formed when object is placed:

Question # 11

Light waves are:

Question # 12

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

Question # 13

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

Question # 14

With age, least distance of distinct vision:

Question # 15

The wave nature of light was proposed by:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 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:
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
3 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
4 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
5 The property of light which does not change with the nature of the medium is:
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
6 The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
A. 1
B. 0.2
C. 2
D. 0.1
7 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
8 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
9 The focal length of convex lens having magnifying power of 5.55 is:
A. 5.5 cm
B. 5 cm
C. 4.5 cm
D. 6 cm
10 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm

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