Q. Which electromagnetic wave has the longest wavelength?
(A) Gamma rays
(B) X-rays
(C) Microwaves
(D) Radio waves
The answer is: (D) Radio waves
Q. Which electromagnetic wave has the longest wavelength?
(A) Gamma rays
(B) X-rays
(C) Microwaves
(D) Radio waves
The answer is: (D) Radio waves