Three flat layers of transparent material are stacked upon one ...

[erika]

Three flat layers of transparent material are stacked upon one another. The top layer has index of refraction n1, the middle n2, and the bottom one n3 . If n1 > n2 > n3, and a ray of light in air strikes the top layer, at which surface given can total internal reflection occur first?
 a. the top surface
  b. the surface between materials with indices n1 and n2
  c. the surface between materials with indices n2 and n3
  d. Total internal reflection cannot occur at any of these surfaces.

Question 2

An 100-g piece of copper, initially at 295C, is dropped into 250 g of water contained in a 300-g aluminum calorimeter; the water and calorimeter are initially at 10.0C. What is the final temperature of the system? (Specific heats of copper and aluminum are 0.0920 and 0.215 cal/gC, respectively. cw = 1.00 cal/gC)
 a. 12.8C
  c. 18.1C
  b. 16.5C
  d. 32.1C

[braelync]

Answer to Question 1

B

Answer to Question 2

C

[erika]

TYSM

[matt95]

Gracias!