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

A ray passing through optical center of a lens, after refraction:

Question # 2

Conventionally, all the distance p, q, f are measured from _____ of the lens:

Question # 3

If the object is situated at focus of a convex lens, then its image is formed at:

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

The wave nature of light was proposed by:

Question # 8

The terms phase difference and path difference are:

Question # 9

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

Question # 10

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:

Question # 11

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

Question # 12

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

Question # 13

According to Huygen's principle

Question # 14

Light has:

Question # 15

Laws of reflection and refraction can also be explained by:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 Monochromatic light means waves of:
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
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 For the virtual image, option _______ is not correct:
A. 1/p = 1/f -1/q
B. 1/f = 1/p -1/q
C. 1/p=1/p-1/f
D. 1/p=1/f+1/q
5 The locus of all the points in the same phase of vibration is called:
A. Wave packet
B. Wave front
C. Wave number
D. None of them
6 A line which represents the direction of travel of a wave is known as:
A. Spherical Wavefront
B. Locus
C. Ray
D. Either B or C
7 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
8 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
9 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
10 The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
A. Greater than
B. Less than
C. Equal to
D. None of these

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