oysterbb
Banned

"The refractive index for glass is 1.50. A beam of light strikes an air-glass boundary at an angle of 40 degrees. What is the value of the ratio sin i/sin i for light passing though air into glass."

N1 = 1
N2 = 1.50
i = 40
r = x

Sin i / Sin r = N2 / n1

.'.

sin40/sinr = 1.50/1

Sin r = sin40/1.50

Sin r = 0.4285...

r = 25.37..

So the ratio would be

Sin 40
--------
Sin 25.37

I think.