The spectrum of electromagnetic waves is divided into a number of regions such as radio waves, visible light and gamma radiation.
State three distinct features of waves that are common to all regions of the electromagnetic spectrum.
A typical wavelength of visible light is 
. Calculate the number of wavelengths of this light in a wave of length 
.
State a typical wavelength for
X-rays,
infra-red radiation.
wavelengths of visible light in a 
to 
.
to 
.
