Phones and Computers
Reflection
Defined by when light waves 'bounce off' a specific surface
Refraction
Defined by the bending of light
The density of an object affects if light will refract or reflect
The higher the density the more the light bends to the normal
EM Spectrum
All waves travel at the speed of light in vacuum
Gamma Ray, X-Ray, Ultraviolet, Visible, Infrared, Microwave and Radio
Diffraction
Diffraction is the slight bending of light as it passes around the edge of an object
click to edit
The Wave Equation
Speed = Wavelength x Frequency
V = L x F
V - velocity, measured in m/s
L - wavelength, measured in metres
F - frequency, measured in hertz (Hz)
Colour
Things appear coloured because only specific frequencies of light bounce off the objects we look at
Heat
Heat is a form of energy
Heat flows from where it is hotter to where it is cooler
The more particles vibrate, the hotter they are
Conduction, Convection and Insulation
Metals are good conductors as they allow electrons to pass heat energy across the atoms
Non-metals are bad conductors as they do not have free electrons to pass on energy
Insulators are bad at absorbing heat which means they trap heat instead
Convection is a heat transferring process that occurs in liquids and gases.