Question

A light wave has a frequency of $4\times {10}^{14}$ Hz and a wavelength of $5\times {10}^{-7}$ m in a medium. The refractive index of the medium is

• A. $1.5$
• B. $1.33$
• C. $1.25$
• D. $1.75$

Answer 1

Answer: (A)

$1.5$

$\mu =\frac{c}{v}=\frac{c}{\nu \lambda }$

$\frac{3\times {10}^8}{4\times {10}^{14}\times 5\times {10}^{-7}}$ =1.5