Question

10 Select the correct answer. What property of a wave remains unchanged when a wave enters a different medium? O A amplitude OB. frequency OC. wavelength OD. velocity O E. density Reset​

Answer 1

a and b ik thats the awser becuse imjust did it

Answer 2

B frequency

Step-by-step explanation:

if the frequency changes so does the energy and that doesn't happen to EM waves entering a medium by the conservation of energy

Correct me if im wrong but im 100% its B