question_answer 44)

  The optical density of turpentine is higher than that of water, while its mass density is lower. Fig. 6(EP).2 shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in Fig. 6(EP).2, the path shown is correct ? (a) 1                                       (b) 2 (c) 3                                       (d) 4

Answer:

  (b) In Pig. 6(EP).7, the path shown for the ray 2 is corret The ray suffers two refractions : At A, ray goes fro air to turpentine, bending towards normal. At B, ray goes from turpentine to water (i.e., From denser to rarer medium), bending away from normal.