question_answer

When a ray of light passing from air to medium. Find the following: a)   The angle of deviation d is (a) \[{{45}^{o}}\]                              (b) \[{{0}^{o}}\]    (c) \[{{15}^{o}}\]                              (d) \[{{75}^{o}}\] b)  The velocity of light in the medium is (a) \[\sqrt{\frac{3}{2}}\times {{10}^{8}}m/s\]     (b) \[\frac{3}{\sqrt{2}}\times {{10}^{8}}m/s\] (c) \[3\times {{10}^{8}}m/s\] (d) \[\sqrt{2}\times {{10}^{8}}m/s\]

Answer:

                (a)          (c) \[d=i-r;\text{ }d={{15}^{o}}\] (b)          (b) \[\mu =\frac{\sin i}{\sin r}=\sqrt{2}\]