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The phenomenon by which the incident light falling on a surface is sent back into the same medium is known as
A. Reflection
B. Refraction
C. Dispersion
D. None

Last updated date: 19th Apr 2024
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Hint: Optical phenomena happen when light waves interact with matter. Examples of this are Reflection, Refraction, Dispersion, etc.

Complete Step by step solution:

Reflection is the phenomenon by which any incident wave-front falling on a surface is sent back into the same medium where it originated. There are three laws of reflection that are
(i) The incident ray, the reflected ray and the normal at the point of incidence, all lie in the same plane.
(ii) Angle of incidence is equal to Angle of reflection.
(iii) The reflected ray and the incident ray are on the opposite sides of the normal.

Refraction is the phenomenon of bending of a light wave or change in its direction when it is going from one medium to another. A lens is a refractive surface used for many purposes, such as magnification.

Dispersion is the phenomenon in which the white light when passed through a glass prism splits into its spectrum of colours. This phenomenon along with refraction is responsible for the formation of rainbows in the sky.

So the answer to the given question is Reflection, option (A)

Note: Reflection is the bouncing back of light in the same medium when incident on any surface.
Refraction is the bending of light when it goes from one medium to another.
Dispersion is the splitting of white light into its spectrum of colours when passed through a glass prism.