Physics P6: Waves

What needs to be used to prevent alpha, gamma and beta particles travelling?

Alpha- paper

Beta- Aluminium

Gamma- thick lead

What is an isotope?

an isotope is an atom of a chemical element that has the same number of protons but a different number of neutrons compared to other atoms of the same element

What is the radius of an atom?

1×10^-10m

What are some uses of radiowaves

TV, Radio

What are some uses of visible light waves

Vision, optical fibres

What are some uses of U-V waves

tanning, energy efficient bulbs

Uses of x-rays?

Medical scan, airport security

Uses of gamma rays?

radiotherapy, sterilisation

What are ‘the waves’ , in order

Radio, Micro, Infrared, Visible, U-V, X-Ray, Gamma

Which waves are ionising?

U-V, X-Ray, Gamma

What is the speed of light?

300,000,000m/s

What is the definiton of these?

Period- time taken for 1 full wave movement

Crest- top part of a wave

Trough- bottom part of a wave

Frequency- number of waves that occur every second

Amplitude- distance from the equilibrium to the crest

Wavelength- distance from 2 identical points

What are transveral waves

waves that travel perpendicular to the direction of travel (up and down)

what are longitudinal waves

waves that travel parallell to the direction of travel (left and right)