- 30 1 (6.41 KiB) Viewed 24 times
60o - 90 o prism as shown. The
incident beam is directed at an angle of φ1 =
46.7o with respect to the horizontal and enters the
prism at a height h = 22 cm above the base. The beam leaves the
prism to the air at a distance d = 55.6 along the base as
shown.
1) What is φ2, the angle the beam in the prism makes
with the horizontal axis?
2) What is n, the index of refraction of the prism for red
light?
3) What is φ3, the angle the transmitted beam makes
with the horizontal axis?
4) What is φ1,max, the maximum value of
φ1 for which the incident beam experiences total
internal reflection at the horizontal face of the prism?
5) The red beam is now replaced by a violet beam that is
incident at the same angle φ1 and same height h.
The prism has an index of refraction nviolet = 1.67
for violet light. Compare dviolet, the exit distance for
violet light, to d, the exit distance for red light.
dviolet < d
dviolet = d
dviolet > d
6) Suppose now that the violet beam is incident at height
h, but makes an angle φ1,v =
60o with the horizontal. What is φ3,v,
the angle the transmitted beam makes with the horizontal axis?
30⁰