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

00:00
Question # 1

For the virtual image, option _______ is not correct:

Question # 2

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

Question # 3

Wave length of that color as compared to that of violet color is:

Question # 4

Electromagnetic waves transport:

Question # 5

A magnifier gives an image which is:

Question # 6

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

Question # 7

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

Question # 8

The distance from eye to near point is taken as:

Question # 9

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Question # 10

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

Question # 11

If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:

Question # 12

Huygen's theory cannot explain

Question # 13

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

Question # 14

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

Question # 15

The size of the image is maximum when its distance from the magnifying glass is:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
3 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
4 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
5 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
6 In the formula R = N x m for diffraction grating, N denotes:
A. No. of lines/cm
B. No. of lines/meter
C. Total number of lines
D. None of above
7 Least distance of distinct vision of an old man possibly becomes:
A. A little less than 25 cm
B. A little more than 25 cm
C. Much less than 25 cm
D. None of these
8 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
9 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
10 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them

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