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Physics: Waves

Key questions on waves

QuestionAnswer
describe a transverse wave vibrations/oscillations are perpendicular from direction of energy transfer
describe a longitudinal wave vibrations/oscillations are parallel from direction of energy transfer
define amplitude maximum displacement from a point on a wave from its undisturbed position
define wavelength the distance between the same point on two adjacent waves
define frequency the number of complete waves passing a certain point per second
equation for wavespeed wavespeed = wavelength x frequency
what are all 7 EM waves? Radio waves, Micro waves, Infared waves, Visible light waves, Ultraviolet waves, X-ray waves, Gamma ray waves.
EM waves can travel through vacuums because... EM waves aren't vibrations of particles, they are vibrations of electric and magnetic fields.
If waves are absorbed... this transfers energy to the materials energy stores
If waves are transmitted... this causes the wave to carry on travelling through the material (usually causing rarefaction)
define specular reflection happens when a wave is reflected in a single direction by a smooth surface
define diffuse reflection is when a wave is reflected by a rough surface - and the waves are scattered in different directions
define refraction when a wave crosses a boundary between materials at an angle it changes direction
Created by: beth.dawkin
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