These particular types travel as photons (aka electromagnetic waves). Air is not necessary.radio waves, cell phone signals and WiFi
How do Faraday cages block electromagnetic waves then?air is an insulator - but not a very good insulator
this shows up, in part, via snell's law
the index of refraction is n = c/v(medium)
which in vacuum is c/c, or 1 (exactly)
the index of refraction of air is (about) 1.0004, hence, for most purposes
we can treat air as the same as vacuum
electromagnetic waves do not consist of electrons
EM waves are waves of time varying and space varying electric and magnetic fields
per Faraday and Maxwell, changing electric fields induce magnetic fields,
and changing magnetic fields induce electric fields, hence EM waves are self propagating
(that is, they re-induce themselves continuously)
You mean to say there is more after gamma rays? And thus far we have only been able to identify upto gamma rays?EM waves include, but are not limited to, gamma through radio, as in the chart.
visible light is that short portion that we see as colors.
there is no reason to believe the chart stops at either end.
the chart shows the limit of our ability to observe and produce EM waves.
Why are wires needed for electricity to pass through? Can there be wireless electricity?also, electrons (and hence current) do not need a medium to travel through
there are a variety of particle accelerators (cyclotrons, synchronous, etc) that
accelerate all manner of particles in a vacuum.
these also occur naturally, such as the solar wind and cosmic rays (muons, etc)
Light and radio are of the same nature as residing on the electromagnetic spectrum. If light is photons then so is radio.I thought photons referred to only light particles/waves.
Shouldn't electromagnetic waves be stopped in an insulator? Because they don't have any conductivity to move.
We might guess that an electron is knocked out of orbit around an atom and flies off as a photon at the speed of light. This surmise may not necessarily be correct, however.Aren't electromagnetic waves made up of electrons? Electrons need conductive material to move, air is mentioned in textbooks as an insulator, so I'm confused how they can move in air.