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Answer:
What is Reflection of Light?
When a ray of light falls on any object (polished, smooth, shiny object), light from the object bounces back those rays of light to our eyes and this phenomenon is known as “Reflection” or “Reflection of Light”.
This phenomenon is what enables us to look at the world around us and is based on the property that light travels in a straight line. For example, twinkling of stars or light reflected by a mirror.
Reflection of Light
(Source: Wikipedia)
Laws of Reflection
In the diagram given above, the ray of light that approaches the mirror is known as “Incident Ray”. The ray that leaves the mirror is known as “Reflected Ray”.
At the point of incidence where the incident ray strikes the mirror, a perpendicular line is drawn known as the “Normal”. This normal is what divides the incident ray and the reflected ray equally and gives us the “Angle of Incidence” (Qi) and “Angle of Reflection” (Qr).
Hence the above information gives us the “Laws of Reflection of Light” which state that :
a. The angle of incidence is equal to the angle of reflection.
b. The incident ray, the normal and the reflected ray, all lie in the same plane.
Learn more about Reflection of Light by Spherical Mirrors.
Types of Reflection :
There are majorly two types of reflection :
a. Specular/ Regular reflection
b. Diffused/ Irregular reflection
a. Specular/Regular reflection :
Specular/Regular reflection is a mirror-like reflection of rays of light. Here the rays of light which are reflected from a smooth and shiny object such as a mirror, are reflected at a definitive angle and each incident ray which is reflected along with the reflected ray has the same angle to the normal as the incident ray. Thus, this type of phenomena causes the formation of an image.
Reflection of Light
(Source: Wikipedia)
Learn how is Image formed in Spherical Mirror here.
b. Diffused/Irregular reflection:
Diffused/Irregular reflection is a non-mirror-like reflection of light. In this type of reflection rays of light that hit an irregular object with a rough surface, are reflected back in all directions. Here, the incident ray which is reflected along with reflected ray doesn’t have the same angle to the normal as the incident ray.
Thus, this type of reflection doesn’t form an image.