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

The terms phase difference and path difference are:

Question # 2

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

Question # 3

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

Question # 4

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Question # 5

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 # 6

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

Question # 7

To sources are said to be coherent if they have:

Question # 8

The distance from eye to near point is taken as:

Question # 9

Light appears to travel in straight line because

Question # 10

A virtual image is formed when object is placed:

Question # 11

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

Question # 12

Electromagnetic waves transport:

Question # 13

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

Question # 14

For the virtual image, option _______ is not correct:

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 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
2 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
3 Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:
A. 6 x 10-5rad
B. 7 x 10-5rad
C. 8 x 10-5rad
D. None of these
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 size of the image is maximum when its distance from the magnifying glass is:
A. 0.10 m
B. 0.15 m
C. 0.20 m
D. 0.25 m
6 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
7 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
8 To observe interference of light, the condition, which must be met with is that the sources must be:
A. Monochromatic
B. Phase coherent
C. Both of above
D. None of above
9 Resolving power in mth order diffraction for grating is given by:
A. R = N x m
B. None of these
C. R = m/N
D. R = N/m
10 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them

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