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 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

Question # 2

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 # 3

Star twinkle due to

Question # 4

The fibre core has constant refractive index such as

Question # 5

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 # 6

The time taken by light for its passage from M to m and back is

Question # 7

Which one of the following phenomenon cannot be explained by the wave theory of light ?

Question # 8

Inspite of different dispersion, all the wavelengths arrive at the other end of the fibre at the same time. With a step-index fibre overall time difference may be about

Question # 9

Michelesion's interferometer is an instrument usually used to measure

Question # 10

Spectrometer using diffraction grating can measure

Question # 11

For interference to occur the two light waves should be:

Question # 12

A ray of light always points

Question # 13

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

Question # 14

Monochromatic light means waves of:

Question # 15

In newton's rings see through the reflected light, centeral spo is:

Question # 16

The image formed after objective lens of an astronomical telescope is

Question # 17

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 # 18

Which of the following is an optically active material

Question # 19

2 d sin θ = nλ can be used to determine the

Question # 20

In YDS experiment, the condition for constructive interference of two coherent waves is that the path difference should be

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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 In Young s double slit experiment the separation between the slits in halved and the distance between the slits and the screen is doubled the fringe with will
A. Be doubled
B. Be quadrupled
C. Remain the same
D. Be halved
2 A converging lens in used to from an image on a screen when the upper half of the lens is covered by an opaque screen
A. Half the image will disappear
B. No change either in size or in intersity
C. Intensity of image will increase
D. Intensity of the image will decrease
3 A ray of light reflected from a dense medium under goes a phase change of:
A. 30°
B. 60°
C. 90°
D. 180°
4 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
5 Electromagnetic waves transport:
A. Energy only
B. Momentum
C. Both A and B are correct
D. None is correct
6 Which of the following is an optical fibre in which the density of central core decreases towards its periphery?
A. multi-mode step index fibre
B. multi-mode graded index fibre
C. both of them
D. none of them
7 A thin layer of oil on the surface of water looks colored due to:
A. Diffraction of light
B. Reflection of light
C. Dispersion of light
D. Interference effect of light
8 The time taken by light for its passage from M to m and back is
A. 2c/d
B. d/2c
C. 2d/c
D. d2/2c
9 Fringe spacing ΔY is the distance between two adjacent bring fringes on the screen is
A. ΔY = Lλ/d
B. ΔY = Ld/λ
C. ΔY = dλ/L
D. ΔY = Lλ/d m
10 Successive dark and bright fringes are formed each time the moveable mirror in Michelsion's interferometer is moved a distance
A. λ/2
B. λ/4
C. λ
D. 3/2λ

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