what is crtitcal angle as light passes through air (n i=1.00) into a glass prism (n r=1.51) so that the light is not totally reflected internally?
I used the equation:n i * sin(theta i) = n r * sin(90)(1.00)sin(theta i) = (1.51)(1)
sine(Θi) = nr •
ni • sine(Θcrit) = nr • sine(90 degrees)
ni • sine(Θcrit) = nr
sine(Θcrit) = 1/1.51
is this the critical angle for light entering the prism?
Yes, it is critical ange.
It is the minimum angle for TIR.
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