What is the 'normal', A dotted line drawn perpendicular to the surface of the refracting material, at the point of entry of the light, Angle of incidence, , FAST-when light passes into a different density, Faster away from the normal slower towards the normal, Longitudinal wave, , Transverse Wave, , Period, The time for one wave to pass., Amplitude, Measures how much energy is in a wave., Frequency, The number of waves produced each second, The wave with the most radioactivity., Gamma, The wave with the lowest frequency, Radio.

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