KCET 2017 Physics Solved Paper

According to Huygen’s principle, during refraction of lightfrom air to a denser medium the wavelength of light and speed decrease. Since
λ‌medium ‌=‌

λ0

µ

⇒λ‌medium ‌∝‌

1

µ

Therefore, for denser medium wavelength decreases. Also,speed of light is lesser in a medium than in vacuum.