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

Which one of the following phenomena is not explained by Huygen's construction of wavefront?

Question # 2

For a system to transmit thousands of telephones conversations, several television programs and numerous data signals, it need the following number so threads of optical fibre

Question # 3

If the incident light contains different wavelengths the images of each wavelength for a certain value is diffracted in the

Question # 4

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 # 5

In Michelsion's interferometer, if a dark fringe is seen in the beginning, the next dark fringe will appear by moving the moveable mirror through a distance

Question # 6

The twinkling of stars is due to

Question # 7

In an interference fringes pattern the fringes are

Question # 8

Which characteristics of wave, established the Huygen's wave theory in 1801?

Question # 9

Identify the incorrect statement

Question # 10

A pulse of light in the optical fibres represents the number

Question # 11

The direction of a ray of light is.......to the wave front.

Question # 12

A normal to the waves front showing direction of propagating of wave is called

Question # 13

If the power of a lens is 4 diopters then is focal length is

Question # 14

In an astronomical telescope is the objective has the focal length fo is

Question # 15

In the thin film, the path difference of two reflected ray depends upon

Question # 16

A line which represents the direction of travel of a wave is known as:

Question # 17

The light signal in graded index fibre is totally confined due to

Question # 18

In Bragg's Equation 2d sin θ = nλ, where 'n' is

Question # 19

For the normal setting of a telescope

Question # 20

In YDS experiment, if the distance between the slits and also the distance between slits and screen is doubled, the fringe width

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MCAT Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 Spectrometer can be used to
A. Measure wave length of light
B. Measure refractive index of the materials
C. Study spectra of light
D. All
2 In young's slit experiment on interference the ratio of the intensities of a bright band and a dark band is 6 : 1 the ratio of the amplitudes o the interfering waves is
A. 16
B. 5/3
C. 4
D. 1/4
3 In Michelsion's interferometer, if 'm' number of fringes are passed in front of a reference point when the moveable mirror is moved a distance L, then
A. L = mλ
B. L = 2mλ
C. L = mλ/2
D. L = 3/2 mλ
4 In the relations d sinθ = nλ, shows that the value of θ depends upon 'n' so the images of different colours are much separated in
A. Low orders
B. Middle orders
C. High order
D. None of these
5 The distance between different interference fringes are:
A. Variable
B. Same
C. Different
D. None of these
6 In YDS experiment, data given isλ= 500 nm, L = 100 cm,Δy comes out to be
A. 0.5 cm
B. 0.5 mm
C. 0.5 nm
D. 0.5 m
7 The re conversion of light signals into electrical signals takes place due to
A. Transmitter
B. Receiver
C. Generator
D. None of these
8 The ability of an instrument of reveal the minor details of an object under examination is called
A. Resolution
B. Magnification
C. Resolving power
D. Dispersion
9 Wavelength of X-rays falling at a glancing angle of 30° on a crystal with atomic spacing 2 x 10-10m for first order diffraction is
A. 4 x 10-10m
B. 2 x 10-10m
C. 0.2 x 10-10m
D. 20 x 10-10m
10 For interference to occur, the light coming from the two slits should
A. be monochromatic
B. come from the same source
C. have a constant path difference
D. all of them

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