Author Question: Two parallel beams of light in air strike the surface of a transparent material and the refracted ... (Read 90 times)

Collmarie · **on:** Jul 28, 2018

Two parallel beams of light in air strike the surface of a transparent material and the refracted beam 1 is closer to the normal than beam 2 . Which beam is traveling at higher speed in the material, and which beam has the higher index of refraction in the material?
a. beam 1, beam 1
c. beam 2, beam 2
b. beam 1, beam 2
d. beam 2, beam 1

Question 2

A 2.0-m2 Thermopane window is constructed, using two layers of glass 4.0 mm thick, separated by an air space of 5.0 mm. If the temperature difference is 20C from the inside of the house to the outside air, what is the rate of heat flow through this window? (Thermal conductivity for glass is 0.84 W / m C and for air 0.0234 W / m C.)
a. 7700 W
c. 180 W
b. 90 W
d. 550 W