MDCAT Physics Chapter 7 MCQ Test With Answer for (Light )

Many students feel anxious about how to prepare for the exam during the MDCAT preparation effectively. Solving MCQs is considered one of the best ways to analyze your preparation level before the commencement of the test. The students preparing for the MDCAT are informed that they can get the MCQs of chapter 7 of physics from this platform.

MCQ's Test For MDCAT Physics Chapter 7 Light Online Test

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MDCAT Physics Chapter 7 Light Online Test

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Question # 1

The diffraction grating is used to measure

Question # 2

Which part of the spectrum is most visible?

Question # 3

The light source used in multimode step index fibre is

Question # 4

At what distance should a book be placed from a 50 Cd bulb so that the luminance on the book becomes 2 Im m-2

Question # 5

Which of the following types of optical fibre has a very thin core of about 5μm diameter and has a relatively large cladding?

Question # 6

The resolution of microscope depends on objective's

Question # 7

The velocity of light in vacuum can be changed by changing:

Question # 8

In a spectrometer experiment monochromatic light is incident normally on a diffraction grating having 4.5 x 105 lines per meter.The second order line is seen at an angle of 30 to the normal what is the wavelength of the light?

Question # 9

The optical fibre has a layer over the central layer is called cladding of refractive index

Question # 10

Which type of optical fiber has the largest diameter

Question # 11

If Young s double slit experiment is immersed in water then the fringes with

Question # 12

Electromagnetic waves transport:

Question # 13

The sky appears blue because

Question # 14

Plane microwaves are incident on a long slit having a width of 5 cm.The wavelength of the microwaves if the first minima is formed at 30° is

Question # 15

Glare produces when light reflects from water snow and rough road surfaces when their angle of incidence is

Question # 16

According to Young s experiment if frequency of light used is halved then fringe width becomes

Question # 17

Which effect provides direct experiment evidence that light is a transverse rather than a longitudinal,wave motion?

Question # 18

A ray of light reflected from a dense medium under goes a phase change of:

Question # 19

The total internal reflection takes place for glass-air boundary is then the angle is

Question # 20

For a point source of light the wave front produced are

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MCAT Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 A telescope is rotatable about the same vertical axis as the turntable, with a scale which is
A. Main scale
B. Vernier scale
C. Half degree scale
D. None of these
2 When the light is incident on polarizing angle which of the following is completely polarized?
A. Reflected light
B. Refracted light
C. Both reflected and refracted light
D. Neither reflected nor refracted light
3 If the two reflected waves reinforce each other then the firm as seen from the parallel beam of monochromic light will look
A. Dark
B. Bright
C. Sometimes bright and dark
D. None of these
4 Light appears to travel in straight line because
A. It is not absorbed by the atmosphere
B. It is refracted by the atmosphere
C. Its wavelength is very small
D. Its velocity is very large
5 A thin film is a transparent medium whose thickness is comparable with the wavelength of
A. light
B. sound
C. any one of them
D. none of them
6 The critical angle for a ray of light suffering total internal reflection will be smallest for the ray traveling from
A. Water to glass
B. Water to air
C. Glass to air
D. Glass to water
7 A material having high refractive index has
A. Low density
B. High density
C. Zero density
D. None of these
8 A polaroid is:
A. An adjustable shutter
B. A device used to analyze polarized light
C. A device used in polarimeter
D. A light filter
9 The length of a telescope is 36 cm.The focal lengths of its lenses can be
A. 30 cm,6 cm
B. -30 cm,-6 cm
C. 30 cm,-6 cm
D. -30 cm,-6 cm
10 Phenomenon of interference and diffraction support the:
A. Quantum nature of light
B. Tranverse nature of light
C. Wave nature of light
D. Complex nature of light

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