A ray of light is incident on the mid-point of a glass prism ...

[burton19126]

A ray of light is incident on the mid-point of a glass prism surface at an angle of 25.0 with the normal. For the glass, n = 1.55, and the prism apex angle is 40.0. What is the angle of refraction as the ray enters the air on the far side of the prism? The surfaces involved are those of the apex angle.
 a. 39.4
  c. 22.3
  b. 46.0
  d. 14.1

Question 2

A brass cube, 10 cm on a side, is raised in temperature by 150C. The coefficient of volume expansion of brass is 57  10-6/C. By what percentage does volume increase?
 a. 12
  c. 1.1
  b. 2.8
  d. 0.86

[chereeb]

Answer to Question 1

A

Answer to Question 2

D