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

The magnifier forms a virtual image of the object at:

Question # 2

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

Question # 3

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

Question # 4

The distance from eye to near point is taken as:

Question # 5

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

Question # 6

Wave length of light, on the average, is given by:

Question # 7

Electromagnetic waves transport:

Question # 8

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

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 appearance of the colour in the soap (oil) film results from:

Question # 11

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

Question # 12

Huygen's theory cannot explain

Question # 13

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

Question # 14

The velocity of light in vacuum can be changed by changing

Question # 15

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

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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. Larger
B. Zero
C. None of these
D. Smaller
2 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
3 Which one of the following phenomenon cannot be explained on the bases of Huygen's theory
A. Refraction
B. Reflection
C. Diffraction
D. Formation of spectrum
4 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
5 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
6 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
7 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
8 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
9 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
10 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

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