write some important term related to refraction in detail .
Answers
Some Important Term Related to Refraction
1.⇒ Incident Ray
When the ray of light fall on surface separating two media, then it is called incident ray. In a given figure PQ is the surface separating two visible media (say, air and glass) and AB is incident ray.
2.⇒ Point of Incidence
In the given figure B is the point of incidence on surface PQ.
3.⇒ Normal
The perpendicular drawn at the point of incidence is called normal. In figure NN' is normal.
4.⇒ Refracted Ray
The rays go into the second medium is called refracted ray. In the figure BC is refracted ray.
5.⇒ Angle of Incidence
The angle which the incidence ray makes with the normal is called angle of incidence. In figure, ∠ ABN = ∠i = angle of incidence.
6.⇒ Angle of Refraction
The angle which the refracted ray makes with the normal is called angle of refraction. In figure ∠ CBN = ∠ r = angle of refraction.
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