Homework 1 - Golshani(ag5873 Homework 01 Yao(57045 This...

Golshani (ag5873) – Homework 01 – Yao – (57045) 1
This print-out should have 13 questions.
Multiple-choice questions may continue on
the next column or page – find all choices
before answering.
001 10.0 points
The reflecting surfaces of two intersecting flat
mirrors are at an angle of 62
◦
, as shown in
the figure. A light ray strikes the horizontal
mirror at an angle of 49
◦
with respect to the
mirror’s surface.
62
◦
49
◦
φ
Figure is not drawn to scale.
Calculate the angle φ .
Answer in units of
◦
.
002 10.0 points
Consider a light ray which enters from air to
a liquid, where the index of refraction of the
liquid is given by n =
√
2.
n = 1
n =
√
2
Air
Liquid
light
ray
Denote the wavelength and the frequency
in the liquid by λ
′
and f
′
and those in the air
by λ and f . Choose the correct pair of ratios:
1.
λ
′
λ
= 2 ,
f
′
f
= 1
2.
λ
′
λ
=
1
√
2
,
f
′
f
=
√
2
3.
λ
′
λ
=
1
2
,
f
′
f
= 1
4.
λ
′
λ
=
1
2
,
f
′
f
=
√
2
5.
λ
′
λ
=
√
2 ,
f
′
f
=
√
2
6.
λ
′
λ
= 1 ,
f
′
f
=
√
2
7.