Select the correct answer. A perlodic wave travels from one medlum to another. Which palr of varlables are likely to change In the process?
OA velocity and wavelength
OB. velocity and frequency
OC. frequency and wavelength
OD. frequency and phase
OE. wavelength and phase

velocity and wavelength likely to change in the process.

Explanation:

When an object passes from one medium to another, refraction occurs. Due to refraction, it changes iits direction. Some of the properties is changed when it undergoes refraction. The velocity of a wave and wavelength change in this process.

Hence, the correct option is (a) "velocity and wavelength".

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge