MCQ
A monochromatic light wave with wavelength $\lambda_1$ and frequency $v_1$ in air enters another medium. If the angle of incidence and angle of refraction at the interface are $45^{\circ}$ and $30^{\circ}$ respectively, then the wavelength $\lambda_2$ and frequency $v_2$ of the refracted wave are :
- A$\lambda_2=\lambda_1, v_2=\sqrt{2} v_1$
- ✓$\lambda_2=\frac{1}{\sqrt{2}} \lambda_1, v_2=v_1$
- C$\lambda_2=\sqrt{2} \lambda_1, v_2=v_1$
- D$\lambda_2=\lambda_1, v_2=\frac{1}{\sqrt{2}} v_1$
