Biomedical Engineering Reference
In-Depth Information
5.00
°
n
= 2.42
n
′
= 1.00
12.18
°
B
24.40
°
n
= 2.42
∼
90.00
°
n
′
= 1.00
C
θ
>
24.40
°
n
= 2.42
θ
′ >
90.00
°
n
′
= 1.00
Figure 1-11.
A light ray travels from a diamond toward air.
A.
For an angle of incidence
of 5.00 degrees, the angle of refraction is 12.18 degrees.
B.
If the angle of incidence
is 24.40 degrees, the angle of refraction is about 90.00 degrees. The refracted ray is
approximately parallel to the surface.
C.
When the angle of incidence exceeds the criti-
cal angle (
∼
24.40 degrees), the light ray undergoes total internal reflection.
11
