Question

Green light wavelength 5460 $\mathring{A}$ is incident on an air-glass interface. If the refractive index of glass is 1.5, the wavelength of light in glass would be $(C=3\times {10}^8{ms}^{-1})$

• A. $3640\mathring{A}$
• B. $5460\mathring{A}$
• C. $4861\mathring{A}$
• D. None of these

Answer 1

The correct option is A $3640\mathring{A}$

given wavelength of Green light is 5460 angstrom

and refractive index of glass is 1.5

we know that

${\lambda }_g=\frac{{\lambda }_a}{\mu }=\frac{5460}{1.5}=3640\stackrel{{}_{\circ }}{A}$

hence option A is correct answer