Question

which type of emr has the 2nd shortest wavelength (a)? infrared gamma rays ultraviolet visible microwaves radiowaves x - rays

Explanation:

The electromagnetic - radiation (EMR) spectrum, from longest to shortest wavelength, is: radio waves, microwaves, infrared, visible light, ultraviolet, X - rays, gamma rays. So the type with the second - shortest wavelength is X - rays.

Answer:

X - rays