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

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Question # 1

A virtual image is formed when object is placed:

Question # 2

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

Question # 3

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

Question # 4

In order to get interference using two light rays

Question # 5

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

Question # 6

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

Question # 7

Huygen's theory cannot explain

Question # 8

The magnifier forms a virtual image of the object at:

Question # 9

When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

Question # 10

The contrast in the fringes in an interference pattern depends upon

Question # 11

The terms phase difference and path difference are:

Question # 12

Huygen's principles states that:

Question # 13

Stars twinkle due to

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Smaller
B. Larger
C. Zero
D. None of these
2 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
3 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
4 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
5 Frequency of red color as compared to that of violet color is:
A. Equal
B. Smaller
C. Greater
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 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
8 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
9 A convex lens acts as diverging lens when the object is placed:
A. Between F and 2F
B. At 2F
C. With focal length
D. Beyond 2F
10 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

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