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ICSE Class 10 Answered

I cannot understand how to find angles and find the path of the ray of light passing through a prism, pls help me 
Asked by m.sribhargav2007 | 03 Feb, 2023, 08:53: PM
Expert Answer
Figure shows refraction of light ray in a prism made up of transparent material like glass .
 
A light ray incident at a point A on left side of prism, refrated along the line AB ,
 
incident on opposite side at B and emerging out of prism.
 
PAQ is normal , i.e perpendicular to left side face and passing through point A .
 
RBS is normal , i.e perpendicular to right side face and passing through point B .
 
Incident angle of light ray is i , i.e. angle between incident ray and normal PAQ .
 
Angle of refraction is r , i.e. angle between refracted ray and normal at A
 
Angle of incidence at right side face is r'  , i.e angle between refratced ray and normal RBS.
 
Angle of emergence is e , i.e angle between emergent ray and normal RBS.
 
As shown in figure , if we extend incident ray and emergent ray inside the prism, we get angle of deviation d
 
Angle of deviation is angle between incident ray and emergent ray.

Answered by Thiyagarajan K | 03 Feb, 2023, 10:15: PM
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