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

Try The 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

Light signals in an optical fibre eventually become dim and must be regenerated by devices called

Question # 2

When a light signal travels along the length of the optical fibre, the power lost by it is due to

Question # 3

Why laser rays are used to measure long distance?

Question # 4

Light of wavelength 800 n m is incident on a pair of slits, forming fringes 4.0 mm apart on a screen. What is the fringe when light of 400 nm is used and the slit separation is halved?

Question # 5

The diameter of an optical fibre with its protective case may be typically

Question # 6

At points where the crest (or trough) of one wave coincides with the crest (or trough) of the other wave, the wave produces

Question # 7

The phenomenon of blending of around edges of an obstacle is called:

Question # 8

Colour of thin film will not show result from

Question # 9

The different parts of spectrometer

Question # 10

A double convex lens act as a diverging lens when the object is

Question # 11

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

Question # 12

The light source in the transmitter can be either

Question # 13

A typical diffraction grating has lines per centimeter is about

Question # 14

If red light is incident on sea water it appears

Question # 15

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

Question # 16

On a diffraction grating a large number of close parallel equidistant slits are ruled on it

Question # 17

Which of the following frequency ranges includes most of the electromagnetic waves emitted by the ultra - violet tubes used in a sun bed?

Question # 18

Power loss taken place when a light signal travels along fibres by

Question # 19

If 5000 lines per cm are ruled on different on a diffraction grating then the slit spacing will be

Question # 20

In Newton,s rings apparatus, we also use

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The answers are also available here to facilitate the students' preparation. With continuous practice, the candidates will be able to get a good score on the entry test. So after preparing for the particular chapter, solve the MCQs and learn about your preparation. Spend maximum time to improve your weak areas and then ace the test with a good score. The students can also solve the other physics chapters' MCQs for better preparation.

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MCAT Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 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
2 The components of a fibre optic communication system is/are
A. At transmitter
B. An optical fibre
C. Receiver
D. All of these
3 Michelson's interferometer is an instrument used to measure the distance with
A. Precision
B. High precision
C. Extremely high precision
D. None of these
4 Which effect provides direct experimental evidence that light is a transverse rather than a longitudinal wave motion?
A. Light can be diffracted
B. Two coherent light waves can be made to interfere.
C. The intensity of light from a point source falls off inversely as the square of the distance from the source
D. Light can be polarized
5 In the Newton's ring, as we proceed towards the periphery of the lens, the thickness of air film
A. gradually decreases
B. gradually increases
C. suddenly becomes zero
D. all of them
6 The total internal reflection takes place for glass-air boundary is then the angle is
A. Equal to 41.8o
B. Greater than 41.8o
C. Less than 41.8o
D. None of these
7 When a light signal travels along the length of the optical fibre, the power lost by it is due to
A. Reflection
B. Refraction
C. Seattering and absorption
D. Diffraction
8 How many types of the optical fibres are
A. One
B. Two
C. Three
D. Four
9 If the moveable mirror in Michelsion's interferometer moves a distanceλ/2, the path difference changes by
A. λ/4
B. λ/2
C. λ
D. 3/2λ
10 In an interference fringes pattern the fringes are
A. Equally spaced
B. Wider near the centre and narrower away from it
C. Narrower near the centre and wider away from it
D. None of these

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