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

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

Question # 2

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

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

The contrast in the fringes in an interference pattern depends upon

Question # 5

Light waves are:

Question # 6

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 # 7

According to Huygen's principle

Question # 8

If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

To see the minor details of the object by microscope, it should have:

Question # 13

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Question # 14

For the virtual image, option _______ is not correct:

Question # 15

The locus of all the points in the same phase of vibration is called:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 The locus of all points in a medium having same phase of vibration is called
A. Crest
B. Trough
C. Wavelength
D. Wave-front
3 The magnifier forms a virtual image of the object at:
A. None of these
B. Both A and B are correct
C. Much farther than the least distance
D. Least distance of distinct vision
4 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
5 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Smaller
B. Larger
C. Zero
D. None of these
6 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
7 In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
A. Greater than
B. Equal to
C. Smaller than
D. None of these
8 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
9 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
10 Frequency of red color as compared to that of violet color is:
A. Equal
B. Smaller
C. Greater
D. None of these

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