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IGCSE Waves (Electromagnetic spectrum (Radio (Uses, Dangers), Microwave,…
IGCSE Waves
Electromagnetic spectrum
Radio
Uses
Dangers
Microwave
Infrared
Light
UV
X ray
Gamma
Properties of waves
Frequency
Wavelength
Time period
Waves carry energy
Amplitude
The height of a wave from the equilibrium position. Bigger amplitude means louder sound.
Formulae
wave speed = frequency × wavelength
Time period= 1➗frequency
refractive index = 1 ÷ sin c
Speed= distance➗time
n = sinI/sinR.
Light
The Law of refraction
Critical angle
Total internal reflection (TIR)
Uses of TIR
Explanation
Refraction
sound
The sound lens
Echoes and reflection
Transverse
Doppler effect
(
https://www.youtube.com/watch?v=WgMxtT_jYf0
)