A ray of light moves from water (n = 1.33) into air (n = 1.00). Is it possible for the light to undergo total internal reflection? Why or why not?
If the incident angle is 36 degrees, what is the angle in air?
the refractive index of water , n1 = 1.33
the refractive index of air , n2 = 1
for total internal refraction , the ray must travels from denser to a rarer medium
when ray moves from water to air , it is possible to undergo total internal reflection
when the angle on incidence , i = 36 degree
let the angle of refraction be r
using the snell's law
sin(r) / sin(i) = n1 /n2
sin(r) /sin(36) = 1.33
r = 51.4 degree
the angle in air is 51.4 degree
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