For the first time on a global scale, 20 years of observations on Mars have been condensed into a single study led by ...

Amplitude, wavelength and frequency - CCEA Reflection and refraction of waves - CCEA Echoes and sonar - CCEA Electromagnetic waves and radar - CCEA ...

Refraction close refractionProcess by which a wave changes speed and sometimes direction upon entering a denser or less dense medium, eg a light ray changes direction when refracted by a lens.