Question

All of the following statements about electromagnetic radiation are true except
1) All electromagnetic radiation travels at the speed of light.
2) All electromagnetic radiation can be considered a form of light.
3) All electromagnetic radiation can be seen.
4) All electromagnetic radiation travels in waves

Answer 1

I believe it is 3, but this is kind of awkward because even though we can't see all the wavelengths of the electromagnetic spectrum we can still "see" them with other instruments.