Topic 2 - total internal reflection

Question 1

Critical Angle

Answer 1

every material special angle of incidence where the light will no longer bend and leave the material. it will shine back

Question 2

If the angle of incidence is smaller than

the critical angle

Answer 2

then the light ray is refracted.

Question 3

If the angle of incidence equals the critical angle

Answer 3

then the light ray is refracted along the boundary.

Question 4

If the angle of incidence is greater than the critical angle,

Answer 4

then the light ray is not refracted and total internalreflection occurs.

Question 5

We can link the ‘critical angle’ of a material to the refractive index we looked at last lesson via this formula…

Answer 5

sin⁡ c = 1/n
c = critical angle, n = refrective index

sin c = n2/n1