Question

Which one of the following is NOT the correct formula for refractive index of glass w.r.t. air (_aμ_g) (i = angle of incidence, r = angle of refraction)

Options

• _aμ_g = `(lambda_"air")/(lambda_"glass")`

• _aμ_g = `(sin "i")/(sin "r")`

• _aμ_g = `("V"_"glass")/("V"_"air")`

• _aμ_g = `(lambda_"glass")/(lambda_"air")`

Answer 1

_aμ_g = `(lambda_"air")/(lambda_"glass")`

Explanation:

_aμ_g = `"c"/"v" = (lambda_"a""v")/(lambda_"g""v") = lambda_"a"/lambda_"b"`