# Higher Physics Homework Refractive Index ```Higher Physics Homework Refractive Index
1) A radio signal is broadcast using a carrier wave with a
wavelength of 150m.
a) With what speed does it travel?
b) If it takes 5&micro;s to travel from the transmitter to the receiver,
how far apart are they?
c) To what frequency must the receiver be tuned?
2) For each of the materials shown below calculate its
refractive index.
a)
b)
MATERIAL
AIR
MATERIAL
AIR
30o
45o
40o
50o
c)
d)
MATERIAL
AIR
MATERIAL
AIR
70o
60o
o
40o
60
3) The dotted lines in the diagrams above are at right angles to
the boundaries. What name is given to such lines?
4) A ray of light enters water at an angle of 60o as shown
below. The refractive index for water is1&middot;33. Calculate the
angle of refraction, θr, for this ray.
AIR
WATER
θr
60o
5) For a ray of light in water, what is the critical angle at the
water - air
boundary?
6) A ray of light with frequency 5&middot;5 &times; 1014Hz passes from air
into a medium with refractive index 1&middot;42.
a) If the angle of refraction is 35o, what is the angle of
incidence?
b) What is the speed of the light in the medium?
c) What is the frequency of the light in the medium?
d) Calculate the wavelength of the light in the medium.
7) A ray of light passes from water to glass as shown. The
glass has refractive index 1&middot;52 and water has refractive index
1&middot;33. What is the value of angle θ?
WATER
GLASS
θ
35o
```