Refraction

Question 1

what is the formula to find the refractive index of a medium

Answer 1

n = c/cs

Question 2

what is Snell’s law

Answer 2

n1Sin1 = n2Sin2

Question 3

if n1>n2 then

Answer 3

theta1

Question 4

when theta = critical angle then

Answer 4

the light is refracted at 90 degrees

Question 5

if theta > critical angle then

Answer 5

total internal refraction occurs

Question 6

what is the formula for the critical angle

Answer 6

Sin(critical angle) = n2/n1

Question 7

what is material dispersion

Answer 7

when the material absorbs some of the light, this means it must be boosted or repeated, the lost energy heats up the cable

Question 8

what is multimode dispersion

Answer 8

light at different angles takes different paths and this arrives at different times, leading to broadening of the signal and overlapping of the signal in parts, which reduces the frequency (the speed at which the information is traveling).

Question 9

how do you avoid multimode dispersion

Answer 9

by increasing the critical angle of the cladding