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

If the moveable mirror in Michelsion's interferometer moves a distanceλ/2, the path difference changes by

Question # 2

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

Question # 3

Conditions for interference are that the two sources should be coherent and

Question # 4

Cladding means a layer of ______ refractive index over the central core of ______ refractive index

Question # 5

X-rays is a type of electron magnetic radiations of much shorter wavelengths of the order of

Question # 6

Newton's rings are:

Question # 7

A spherical wavefront is that which has

Question # 8

Huygen's principle is used to study the

Question # 9

The conversion of electrical signals into light signals taken place due to

Question # 10

Wavelength of light, on the average, is given by

Question # 11

A typical diffraction grating has lines per centimeter is about

Question # 12

Which type of fibre is used to send the signals of long distances?

Question # 13

A fly is sitting on the objective of a telescope pointed towards the moon.What effect is expected on the photography of the moon taken through the telescope?

Question # 14

A simple telescope is consists of

Question # 15

In case of reflection of ray within a denser medium, angle of incidnet is ______ -angle of reflection

Question # 16

With a graded index fibre, the overall time difference between all the wavelengths arrived at the other end may be about

Question # 17

The phenomenon of polarization proves that the light waves are

Question # 18

To observe diffraction phenomenon the size of a obstacle

Question # 19

The ultra-purity of optical fibre is

Question # 20

If a source of light is moving away from stationary observer then frequency of light wave appears to change because of

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Sr.# Question Answer
1 In Young s double slit experiment if we use white light then
A. Colored fringes will be observed
B. Bright fringes will be observed
C. Alternate dark and bright fringes will be observed
D. No interference fringes will be seen
2 Michelson,s interferometer can be used to measure
A. Wavelength of light
B. Intensity of light
C. Amplitude of wave
D. None of these
3 In an interference pattern of Young,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 equally spaced
D. Central fringes are wider than the outer fringes
4 Cladding in an optical fiber is used to
A. Absorb unneccessary light
B. Produce total internal reflection
C. Transmit light
D. Filter light
5 In a never system, the repeaters are placed at about
A. 50 km
B. 75 km
C. 100 km
D. 125 km
6 A simple astronomical telescope consists of
A. Two convex lenses
B. Three convex and one cocave
C. Two concave lens
D. None of these
7 The path difference and phase difference are related to each other as
A. Phase difference = (2π) x path difference
B. Phase difference = (2π/λ) x path difference
C. Phase difference = (λ/2) x path difference
D. Phase difference = (2λ/π) x path difference
8 The angle with the horizontal at which an underwater swimmer will see the setting sun is
A. 91°
B. 32°
C. 49°
D. 69°
9 If the bright fringe into be observed then we have relation
A. Y = mLd/λ
B. Y = mλL/d
C. Y = λd/mL
D. Y = λL/md
10 According to Young s experiment the distance between two adjacent bright fringes of blue light is _____ than for oranges light
A. Less
B. Maximum
C. Equal
D. May be less may be greater depending upon slit spacing
11 The lower refractive index the fibre core has
A. 1.48
B. 1.40
C. 1.54
D. 1.42
12 The light signal in an optical fibre is totally confined due to the
A. total internal reflection
B. continuous refraction
C. both of them
D. either of them
13 When crest of one wave coincides with the trough of the other wave, it give rise to
A. dispersion
B. constructive interference
C. destructive interference
D. polarization
14 The speed of light in other material is always
A. Greater than c
B. Less than c
C. Equal to c
D. None of these
15 In compound microscope image formed is
A. Real erect and diminished
B. Virtual inverted magnitude
C. Real inverted and magnified
D. Virtual inverted and magnified
16 In YDS experiment, data given isλ=500 nm, d=1 mm, L=100cm,∆y come out to be:
A. 0.5 cm
B. 0.5 mm
C. 0.5 nm
D. 0.5 m
17 If the slits in YDS experiment are made closer, fringe spacing will
A. Increase
B. Decrease
C. Remain same
D. None of these
18 The ratio of size of the image to the size of the object is called
A. Resolving power
B. Magnification
C. Power
D. None of these
19 In Michelson interferometer if the moveable mirror is moved through a distance of 8λ then the number of fringes shifted are
A. 4
B. 8
C. 16
D. 32
20 If the wavelength of light used in Michelsion's interferometer is 400 nm and the moveable mirror only moved throughλ/4, then the length moved will be
A. 10 nm
B. 10-2mm
C. 1 nm
D. 10-4mm

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