SSC MTS EXAM

Detailed explanation-1: -The index of refraction for air is taken to be 1 in most cases (and up to four significant figures, it is 1.000). Thus, n1=1.00 here. From the given information, 1=30.0° and 2=22.0°. With this information, the only unknown in Snell’s law is n2, so we can use Snell’s law (Equation 1.4.

Detailed explanation-2: -It is denoted by n with n = c v . The above statement means that the speed of light in glass is 1.5 times slower than the speed of light in a vacuum. It also means that the speed of light in glass is 1 1 . 5 times the speed of light in air.