Waves And Radiation Flashcards
What type of wave has a crest and a trough?
Transverse
What is the distance between waves called?
Wavelength (m)
What is the height of the wave from the axis to the crest called?
Amplitude (m)
What is the symbol for wavelength?
λ
What type of wave is a sound wave?
Longitudinal waves
What is diffraction?
When longitudinal waves bend around an obstacle
What type of wavelength diffracts more effectively?
Long wavelength
What Is frequency?
How many waves are produced in one second (Hz)
What is the speed of sound?
340 m/s
How many types of EM radiation are there?
7 : Gamma rays, X rays, Ultraviolet, Visible light, Infrared, Microwaves, Radio and Television waves
What is an alpha particle?
A positive (2+) Helium nucleus, it is relatively slow and easily stopped by paper or skin. It has a high ionising power
What is a Beta particle?
A negative (-) fast moving electron, it is quite fast and stopped by a few mm of aluminium. It has a medium ionising power.
What is a Gamma ray?
A high energy EM wave with no charge, it is the stepped of light and reduced by a few inches of lead. It has a low ionising power
When passing from air to glass, will light bend to or a away from the normal?
To the normal
