Light in a frozen block of ice reflects off the ice-air interface at the surface of the block. What phase shift does it undergo? A) 0°
B) 90°
C) 180°
D) 270°
E) It does not undergo any phase shift.

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.