Different devices are used to detect different frequency ranges of electromagnetic waves. You simply can't use the same device to detect x-rays, than you would use to detect radio waves, for example.
Electromagnetic radiation is emitted from many different things. Some of the things that emit electromagnetic radiation are microwaves, x-rays and radios.
electromagnetic radiation, a.k.a. light.
Not everything: electromagnetic radiation, beta radiation, gamma radiation, particle beams etc. are not formed from elements.
Nuclear radiation is one invisible killer.
Yes, microwaves cook with radiation. Electromagnetic radiation in the microwave band. It's non-ionizing, but it works well to heat things up.
Invisible things you can actually feel or touch include air (usually as wind but also when there is a temperature difference), radiation, and corrosive gases (such as acids in gaseous form).
It's carried by electromagnetic radiation ... heat, light, UV, things like that.
fallout emits nuclear radiation, but lots of other things do too.fallout is particulates from dust size to baseball size, nuclear radiation is a mix of electromagnetic radiation and high speed subatomic particles.
more radiation ; bad living conditions for the people of earth
No, invisible things do not reflect light. But again, invisible things do not exist.
Radium emits alpha, beta, and gamma radiation. Alpha radiation is fully ionized helium nuclei. Beta radiation is high energy electrons. Gamma radiation is very high energy electromagnetic radiation. All of these can do significant damage to living things.
infra-red radiation only heats things up, so you wouldn't get any specific damage apart from burns