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

Question # 2

Speed of light in vacuum depends upon:

Question # 3

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

Question # 4

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

Question # 5

Resolving power in mth order diffraction for grating is given by:

Question # 6

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

Question # 7

According to Huygen's principle

Question # 8

Laws of reflection and refraction can also be explained by:

Question # 9

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

Question # 10

A prism splits a beam of white light into seven component colors. This is so because

Question # 11

The terms phase difference and path difference are:

Question # 12

Huygen's theory cannot explain

Question # 13

Angle between the ray of light and the corresponding wavefront is:

Question # 14

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

Question # 15

Electromagnetic waves transport:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
2 In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
A. Greater than
B. Smaller than
C. Equal to
D. None of these
3 The magnifier forms a virtual image of the object at:
A. None of these
B. Least distance of distinct vision
C. Much farther than the least distance
D. Both A and B are correct
4 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
5 The contrast in the fringes in an interference pattern depends upon
A. Fringe width
B. Relative difference intensities of the two sources
C. Distance between the slits
D. Wavelength
6 The appearance of the colour in the soap (oil) film results from:
A. Dispersion
B. Interference
C. Reflection
D. Refraction
7 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
8 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
9 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
10 If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:
A. 5 cm
B. 20 cm
C. 10 cm
D. 15 cm

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