refraction

Question 1

finding refractive index

Answer 1

n = c/v or sin i/sin r (less dense to dense); sin r/sin i (dense to less dense)

Question 2

critical angle, C

Answer 2

sin^-1(1/n)

Question 3

what is a critical angle?

Answer 3

the angle of incidence in an optically denser medium for which the angle of refraction in the optically less dense medium is 90 degrees.

Question 4

advantages of optical fiber

Answer 4

• can carry much more information over long distances.
• immune to electromagnetic interference.
• signal transmitted experiences much lesser signal loss.

Question 5

finding angle of refraction, r

Answer 5

sin^-1(sin i/n)