Presentation on theme: "Waves – from GCSE What you need to know before you move into AS waves."— Presentation transcript:
Waves – from GCSE What you need to know before you move into AS waves
Light Rays Can be reflected off materials Can be refracted by passing from a materials of one density into another material of a different density Travel in straight lines at 3 x 10 8 m/s Can show total internal reflection which is used in optic fibres
Wave Definitions Waves transfer energy There are two types of waves – transverse and longitudinal You need to know the definitions of wavelength, frequency, amplitude and speed
Frequency f is the number of waves that occur every second. It is measured in Hertz Hz The Period T of a wave is how long it takes for one wave to occur (measured in seconds) F = 1/T
Wave Definitions - speed Speed = frequency x wavelength V = f λ
Light Visible light waves are the only electromagnetic waves we can see. We see these waves as the colors of the rainbow. Each color has a different wavelength. Red has the longest wavelength and violet has the shortest wavelength. When all the waves are seen together, they make white light.