defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Physics Optics Refraction and Reflection
A light wave travels with velocity v, frequency f and wavelength λ in a medium. It then enters a denser medium. What happens ?
1
v decreases, f unchanged, λ decreases
2
v and f unchanged, λ decreases
3
v decreases, f and λ unchanged
4
v, f, λ all remain unchanged