What is electromagnetic radiation with the shortest wavelength?

Answer 1

The gamma ray has the shortest wavelength (and shortest period) as well as the highest frequency (and highest energy) of all forms of electromagnetic radiation.
That's the part of the spectrum that we call "gamma rays".
There is no definite answer to this as we can have shorter and shorter wavelengths from a value which we have assigned to be the shortest wavelength.

However, gamma rays have the shortest wavelength in the electromagnetic spectrum.
Gamma radiation ;)
The region of the spectrum that we call "gamma rays" has.

Answer 2

The wavelength of electromagnetic radiation is directly related to the energy of that wave. The shorter the wavelength, the more energetic the radiation. The typical high-energy radiation is gamma rays.

Answer 3

Gamma radiation, followed by X-rays, ultraviolet radiation, visible light, infra-red rays, microwaves, and finally, radio waves.

Answer 4

Cosmic rays. Their wavelength can be much smaller than an atom. Not to be confused with particles that enter our atmosphere and shower down high energy byproducts.

Answer 5

Ultraviolet