Answer :

AL2006

#3).  The wavelengths of the four types of electromagnetic
radiation on that list line up like this:

Longest ... microwaves
next . . . . . infrared waves
next . . . . . visible light waves
shortest ... ultraviolet waves

#4).  The word "visible" means "able to be seen".  Infrared
light and ultraviolet light are not visible to human eyes.