Total Internal Refraction

Question 1

Critical angle

Answer 1

The angle of incidence at which the angle of refraction is 90^o/smallest possible angle for TIR

Question 2

sin(θ_i)

Answer 2

1/n

Question 3

What if θ^I>θ_i?

Answer 3

The ray speeds up

Question 4

What if θ^I<θ_i?

Answer 4

The ray slows down

Question 5

Uses of TIR

Answer 5

• Periscopes
• Bicycle and car reflectors
• Binoculars
• Optical fibre cables
• Endoscopes