'O' Level Standard Questions - RefractionQ6. A glass prism has three angles of 60°. A ray of light falls on one of the faces and the angle of incidence is 49°. The ray is refracted and now travels parallel to the second face. When it reaches the third face it is refracted again and emerges from the prism. Find
nairsin θair = nglasssin θglass 1 x sin 49o = nglass x sin 30o nglass = sin 49o/sin 30o (a) nglass = 1.5 We can now find the angle of refraction at the glass/air interface: nairsin θair = nglasssin θglass sin θair = 1.5 x sin 30o sin θair = 0.75 θair = 49o
|
Follow me...
|