Light is shown through air on a diamond (n=2.42) and it partially reflects and refracts.

Based on the incident angle of 62.5 shown, what is the angle of reflection of the light?

Question 10 options:

a)

62.5

b)

21.5

c)

27.5

d)

84.0

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.