AIIMS 2018 Physics Refraction MCQ Question

When a wave passes from one medium to another, its wavelength changes according to the refractive index (μ) of the two media. The relationship between the wavelengths can be expressed as $\frac{\lambda_1}{\lambda_2} = \mu$, where $\lambda_1$ is the wavelength in the first medium (incident) and $\lambda_2$ is the wavelength in the second medium (refracted). Since the refractive index is defined as the ratio of the speed of light in a vacuum to the speed of light in the medium, this ratio directly influences the wavelengths of the waves. Other options are not applicable as they do not provide relevant information or context to the question.