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A rod of glass μ=3/2 and of square of cross section is bent into the shape shown in
A parallel beam of light falls perpendicularly on the plane flat surface A.Referring to the diagram,d is the width of the side and R is the radius of the inner semi-circle,Find the maximum value of Ratio of d/R so that all the light enetering the glass through the surface A emerge from the glass through B.
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16 Answers
24I am talking about the extreme ray through A which is incident at pt Q........becoz if this ray will get totally internally reflected then remaining will automatically will totally internally reflected.....
this is the extreme cond......[1][1]
3how did u conclude dat the ray striking at Q will be the extreme ray.
i cant understand dat thing .dats y i asked can u pls give me more explanation
11Machans, it will be the right extreme ray
"becoz if this ray will get totally internally reflected then remaining will automatically will totally internally reflected....."
Can u pls explain this statement , eureka? I hv difficulty in imagining it, da. [2]
24wait a minute ..........i will draw a figure and the n u will know....
3yup got it eureka no need to draw.tx da.
This ray must be the extreme ray becos this ray have incident angle lesser than the other rays da.correct me if i was wrong.
24oops....didnt read ur post..........anyways u can make it out now....
3eureka but the incident angle will be 45 degrees as in the figure so it always undergoes tir
so no need to solve the question am i rite eureka
3consider the ray reflected at Q
wkd i=r and the rays are at 90 degrees therfore i=45