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

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

Question # 2

Electromagnetic waves transport:

Question # 3

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

Question # 4

The magnifier forms a virtual image of the object at:

Question # 5

Speed of light in vacuum depends upon:

Question # 6

For the virtual image, option _______ is not correct:

Question # 7

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

Question # 8

Laws of reflection and refraction can also be explained by:

Question # 9

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Question # 10

The property of light which does not change with the nature of the medium is:

Question # 11

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

Question # 12

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

Question # 13

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

Question # 14

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

Question # 15

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
2 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
3 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
4 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
5 The locus of all points in a medium having same phase of vibration is called
A. Crest
B. Trough
C. Wavelength
D. Wave-front
6 Resolving power in mth order diffraction for grating is given by:
A. R = N/m
B. R = m/N
C. R = N x m
D. None of these
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 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
9 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
10 Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
A. Gamma rays, micro waves, visible light
B. Radio waves, ultraviolet waves, X-rays
C. Ultraviolet rays, infrared rays, micro waves
D. Visible light, gamma rays, radio waves

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