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What is Reflection? State the Laws of reflection.
Reflection of Light: The phenomenon of bouncing back of light rays in the same medium on striking the smooth surface is known as a reflection of light.
Incident Ray: The ray of light that straightaway falls on the reflecting surface from the object or a source is known as an incident ray.
Reflected Ray: The ray of light which is supposed to be reflected after striking the reflecting surface is known as the reflected ray.
The angle of Incidence: The angle that is formed between the incident ray and the general at the point of incidence is known as the angle of incidence, and it is generally represented by ∠i.
The angle of Reflection: The angle that is formed between the reflected ray and the general at the point of incidence is known as the angle of reflection, and it is generally represented by ∠r.
Normal: A straight line perpendicular to the reflecting surface that acts as a separation between the plane of incidence and the plane of reflection is known as the normal.
There are two laws of reflection :
1) Angle of incidence is always equal to the angle of reflection, i.e., ∠i=∠r.
2) The incident ray, the reflected ray, and the normal at the point of incidence, all lie in the same plane.
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Reflection is the phenomenon of light or any other wave encountering a boundary between two media and bouncing back into the medium from which it originated. It occurs when a wavefront encounters a surface or boundary that does not absorb the wave’s energy and is not able to transmit it. Instead, the wave is reflected back into the original medium.
The laws of reflection describe the behavior of light when it reflects off a surface. These laws are as follows:
The incident ray, the reflected ray, and the normal to the surface at the point of incidence all lie in the same plane.
The angle of incidence (θi) is equal to the angle of reflection (θr), where both angles are measured between the incident ray or reflected ray and the normal to the surface.
These laws are applicable to any type of wave, not just light waves. When light reflects off a smooth and polished surface, such as a mirror, the angle of incidence is equal to the angle of reflection, and the reflected image appears to be behind the mirror at the same distance as the object in front of it.
It’s worth noting that these laws apply to idealized situations, assuming the surface is perfectly smooth and the medium is homogeneous. In reality, surfaces may have imperfections and different materials can have varying degrees of reflectivity.
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