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 magnifier gives an image which is:

Question # 2

In the formula R = N x m for diffraction grating, N denotes:

Question # 3

To sources are said to be coherent if they have:

Question # 4

Huygen's principles states that:

Question # 5

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

Question # 6

Stars twinkle due to

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Light appears to travel in straight line because

Question # 11

The locus of all points in a medium having same phase of vibration is called

Question # 12

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

Question # 13

Resolving power in mth order diffraction for grating is given by:

Question # 14

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

Question # 15

Electromagnetic waves transport:

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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 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
3 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
4 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
5 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
6 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
7 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
8 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
9 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
10 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m

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