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Laws Of Reflection MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET
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12 Questions around this concept.
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A glass prism of refractive index 1.5 is immersed in water . A light beam incident normally on the face AB is totally reflected to reach the face BC if:
Two plane mirrors are arranged at right angles to each other as shown in figure. A ray of light is incident on the horizontal mirror at an angle . For what value of
the ray emerges parallel to the incoming ray after reflection from the vertical mirror?
Two plane mirrors A and B are aligned parallel to each other, as shown in the figure. A light ray is incident at an angle at a point just inside one end of A. The plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is
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A ray of light is incident on a plane reflecting surface at an angle of . Find the deviation in the incident ray. What will be the deviation if the ray suffers a reflection again at a surface inclined at
to the first surface?
A point source of light B is placed at a distance L in front of the centre of a mirror of width d hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance from it. The distance over which he can see the image of the light source in the mirror is
Consider the metal coin in figure. The right half is polished, while left half is unpolished.
In a dark room, this coin is placed face up on the floor and illuminated with a thin-beamed flashlight, as shown in figure. A and B look at the coin from the position as indicated in figure
According to A, which half of the coin (if either) is brighter?
If incident ray MP and reflected ray QN are parallel to each other, find the angle between the mirrors.
Two plane mirrors are inclined to each other at angle . A ray of light is reflected first at one mirror and then at the other. Find the total deviation of the ray
Two plane mirrors are inclined to each other such that a ray of light incident on the first mirror and parallel to the second is reflected from the second mirror parallel to the first mirror. Determine the angle between the two mirrors.
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Laws of reflection
Laws of reflection:
Reflection of light : when ray of light strikes the boundary of two media such as air or glass, a part of light turned back into the same material . This phenomenon is known as "reflection of light".
There are two types of reflection :
- Regular reflection: When the reflection takes place from a perfect plane surface it is called Regular Reflection. In this case, the reflected light has large intensity in one direction and negligibly small intensity in other directions.
- Diffused reflection: When light is reflected from a irregular surface we do not get a regular behavior of
light. Light reflects from the surface such that a ray incident on the surface is scattered at many angles rather than at just one angle.
It has been found that rays undergoing reflection follow two laws called the Laws of Reflection:
(i) The incident ray, the reflected ray, and the normal at the point of incidence lie in the same plane. The plane is called the
plane of incidence (or plane of reflection).
(ii) The angle of incidence (the angle between normal and the incident ray) and the angle of reflection (the angle between
the reflected ray and the normal) are equal, i.e.,
Normal Incidence: When a ray incident normally on a plane
Grazing Incidence: In case light strikes the reflecting surface tangentially
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