Refraction

Total internal reflection

Total internal reflection

Total internal reflection

Total Internal Reflection just occurs. 全反射剛剛發生

c

c 為臨界角

Total internal reflection

Total Internal Reflection occurs. 全反射發生

> C

Diamond

A

B

C

Triangular prism01

A

B

C

Triangular prism01

Optical fibre

eye of a fish

CField of view 視野範圍

Fish-eye view

eye of diver

C = 48.8°

HW (P.63#2a,b)

air

2 m

(a)光線在光導管中進行全內反射 , 可以

用作光纖通訊 .(b)

48.8°

2 m

r = ?

tan 48.8° =

2

r(b)

1988CE

10° 15° 20° 25° 30°

16.1° 24.5° 33.2° 42.5° 53.1°

sin 0.17 0.26 0.34 0.42 0.50

sin 0.28 0.41 0.55 0.68 0.80

(0.5, 0.8)

(0, 0)