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

The terms phase difference and path difference are:

Question # 2

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

Question # 3

Huygen's theory cannot explain

Question # 4

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Question # 5

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

Question # 6

Laws of reflection and refraction can also be explained by:

Question # 7

A magnifier gives an image which is:

Question # 8

A virtual image is formed when object is placed:

Question # 9

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:

Question # 10

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

Question # 11

The magnifier forms a virtual image of the object at:

Question # 12

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

Question # 13

Which one of the following can act approximately as a source of monochromatic light;

Question # 14

Huygen's principles states that:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The locus of all points in a medium having same phase of vibration is called
A. Crest
B. Trough
C. Wavelength
D. Wave-front
2 A ray passing through optical center of a lens, after refraction:
A. Passes through focus
B. Go deviated
C. Retraces its path
D. Both B and C
3 The locus of all the points in the same phase of vibration is called:
A. Wave packet
B. Wave front
C. Wave number
D. None of them
4 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:
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
5 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
6 The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
A. Diffraction
B. Interference
C. Polarization
D. Dispersion
7 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
8 Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
A. Gamma rays, micro waves, visible light
B. Radio waves, ultraviolet waves, X-rays
C. Ultraviolet rays, infrared rays, micro waves
D. Visible light, gamma rays, radio waves
9 A prism splits a beam of white light into seven component colors. This is so because
A. Phase of different colors is different
B. Amplitude of different colors is different
C. Wavelength of different colors is different
D. Velocity of different colors is different
10 To see the minor details of the object by microscope, it should have:
A. High magnifying power
B. High resolving power
C. Am objective of larger focal length
D. None of these

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