1.

If the critical angle for total internal reflection from a medium to vacuum is \[30{}^\circ \], the velocity of light in the medium is                          [CPMT 1972; MH CET 2000;  KCET 2000; BCECE 2003; RPMT 2003]

A. \[3\times {{10}^{8}}\] m/s
B. \[1.5\times {{10}^{8}}\] m/s
C. \[6\times {{10}^{8}}\] m/s
D. \[\sqrt{3}\times {{10}^{8}}\]m/s
Answer» C. \[6\times {{10}^{8}}\] m/s


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