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

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

Question # 2

An optical instrument used to see very far off objects is called

Question # 3

The bright fringes are termed as

Question # 4

Diffraction of light occurs, due to the interference between rays coming from the same wavefront of

Question # 5

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

Question # 6

If light of low wavelength is used in Young's double slit experiment then width of the fine will

Question # 7

For constructive interference path difference should be

Question # 8

According to Huygen's principle, the new position of the wavefront after a time can be found by constructing a surface that touches all the

Question # 9

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper

Question # 10

Fringe spacing in YDS experiment will be maximum if we use

Question # 11

The light which has components in all directions is called

Question # 12

Which of the following properties show light is transverse wave in nature?

Question # 13

An optical fiber of ______ cm in diameter id equivalent to 7.62 cm diameter bundle of ______ wires to carry the same amount of signals

Question # 14

Huygen's wave front which sends out secondary wavelets with a speed equal to

Question # 15

Frequency of red colour as compared to that of violet colour is:

Question # 16

If λ = 589 nm   d=1.0 mm  L=225 cm then fringe spacing ΔY is given by  

Question # 17

A line normal to the wavefront including the direction of motion is called

Question # 18

The typical example/examples of optically active crystals

Question # 19

The materials which are used in selective absorption method to polarize the light are

Question # 20

In Newton,s rings apparatus, we also use

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MCAT Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 In Newton's rings the thickness of air film at the point of contact is
A. maximum
B. minimum
C. equal to wavelength
D. zero
2 A diffraction grating of length 2cm has 4000 lines The grating element is
A. 0.5 x 10-2 cm
B. 5 x 104
C. 5 x 10-4
D. 0.5 x 10-4 cm
3 According to the relation for constructive destructive interference, the point of contact has zero thickness of air so it should have
A. No interference
B. Conductive interference 
C. Destructive interference
D. None of these
4 Confining the light vibrations in one plane is called:
A. Reflection of light
B. Interference of light
C. Polarization of light
D. Diffraction of light
5 A ray of light always points
A. Anti parallel to wave front
B. Perpendicular to wave front
C. Parallel to wave lets
D. None
6 The information received at the other end of a fibre can be inaccurate due to
A. dispersion of light signal
B. spreading of light signal
C. both of them
D. none of them
7 Wavelength of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
8 X-ray diffraction has been very useful in determining structure of
A. Hemoglobin
B. Double helix structure of DNA
C. Blood speed
D. a and b
9 In an interference pattern of Ypung's double Slit (YDS) experiment:
A. Bright fringes are wider than dark fringes
B. Dark fringes are wider than bright fringes
C. Both dark and bright fringes are of equal width
D. Central fringes are wider than the outer fringes
10 If 5000 lines per cm are ruled on different on a diffraction grating then the slit spacing will be
A. 5 x 10-3A°
B. 2 x 10-4A°
C. 5 x 10-5A°
D. 2 x 104A°

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