| At some particular value of iGLASS,
iAIR reaches 90°. 
This angle, iGLASSc, is called
the critical angle for the glass-air surface.
From Snell's law we get
| sin iGLASSc / sin
90° |
= 1 / AIRnGLASS |
| sin iGLASSc |
= 1 / AIRnGLASS |
| iGLASSc |
= sin-1 (1 / AIRnGLASS) |
|
 Calculate the value of
iGLASSc, given that iGLASS
= 1.50.
What would be the value of the critical angle for a water-air surface, given that
iWATER = 1.33?
|
