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

Question # 2

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

Question # 3

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 # 4

Monochromatic light means waves of:

Question # 5

The least distance of distinct vision is:

Question # 6

The cause of mirage observed in deserts in bright sunlight is due to

Question # 7

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

Question # 8

Huygen's principles states that:

Question # 9

The ratio of the size of the image to that of object is called:

Question # 10

A virtual image is formed when object is placed:

Question # 11

The distance from eye to near point is taken as:

Question # 12

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

Question # 13

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

Question # 14

Huygen's theory cannot explain

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 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
2 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
3 The locus of all points in a medium having same phase of vibration is called
A. Crest
B. Trough
C. Wavelength
D. Wave-front
4 The property of light which does not change with the nature of the medium is:
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
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 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
7 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
8 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
9 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
10 The cause of mirage observed in deserts in bright sunlight is due to
A. Refraction of light
B. Reflection of light
C. Scattering of light
D. Total internal reflection of light

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