Part C Thinking Full Solution is required] [10 marks] 15. A ray of monochromatic light travelling in air strikes the end of a 21 cm wide block of Plexiglas at an incident angle of 55. The index of refraction for the Plexiglas is 1.51 and for air is 1.003. 3} Calculate the angle of refraction as the light enters the block. [2 marl-rs] b} The light travels to the opposite side of the block and refracts out into the air. The path of the refracted light ray is parallel to the original light ray but displaced a distance d'. Calculate the value of d. No you cannot just look up a formula on internetJ draw diagram. [8 marks]