question_answer

A beam of light passes from air into a substance X. If the angle of incidence be \[45{}^\circ \]and the angle of refraction be\[30{}^\circ \], calculate the refractive index of the substance X. (Given:\[\sin \,30{}^\circ =0.500,\] \[\sin \,45{}^\circ =0.707\]).

A) 2.023

B) 4.256

C) 0.234

D) 3.321

E) None of these