- A tank is filled with 30 cm of water. A 10 cm layer of oil (n=1.5) is poured on top of the water. There is a laser 10 cm from the surface of the oil aimed at the centre of the tank. The beam diverges from essentially zero width at the laser output to a spot with a 0.5 cm diameter where the laser strikes the surface of the oil. What is the radius of the laser beam on the bottom of the tank? 10 cm KY0.5 cm Water LASER
- A tank is filled with 30 cm of water. A 10 cm layer of oil (n=1.5) is poured on top of the water. There is a laser 10 cm from the surface of the oil aimed at the centre of the tank. The beam diverges from essentially zero width at the laser output to a spot with a 0.5 cm diameter where the laser strikes the surface of the oil. What is the radius of the laser beam on the bottom of the tank? 10 cm KY0.5 cm Water LASER
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6. A tank is filled with 30 cm of water. A 10 cm layer of oil (n=1.5) is
poured on top of the water. There is a laser 10 cm from the surface
of the oil aimed at the centre of the tank. The beam diverges from
essentially zero width at the laser output to a spot with a 0.5 cm
diameter where the laser strikes the surface of the oil. What is the
radius of the laser beam on the bottom of the tank?
10 cm
0.5 cm
Water
7. A light beam (of white light) is incident on a (45°-45°-90°) wedge
of glass (shown below) with the beam parallel to the base of the
wedge. The beam strikes the wedge midway along the sloping
side, as shown below. The index of refraction for red light is 1.51
and the index of refraction for blue light is 1.53. If a screen is
p.
67
(67 of 101)
8°C Cloudy
LASER
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