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

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

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

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

Question # 4

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

Question # 5

Laws of reflection and refraction can also be explained by:

Question # 6

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

Question # 7

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

Question # 8

With age, least distance of distinct vision:

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

If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:

Question # 11

The wave nature of light was proposed by:

Question # 12

Monochromatic light means waves of:

Question # 13

When the object lies between F and 2F, the image formed by is formed at:

Question # 14

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
4 In an interference pattern of Young's double slit(YDS) experiment:
A. Bright fringesare wider than dark fringes
B. Dark fringes are wider than bright fringes
C. Both dark and bright fringes are of equal width
D.

Central fringes are wider than the outer fringes
5 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
6 The ratio of the size of the image to that of object is called:
A. Focal length
B. Aperture
C. Linear magnification
D. Principal axis
7 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
8 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
9 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
10 When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:
A. Greater, smaller
B. Smaller, smaller
C. Smaller, larger
D. Greater, larger

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