a) there is no essential difference in the nature of microwaves and blue light other than a difference in frequency and wavelenght
b) one is a form of radiation, the other is not
c) one has an electric charge, the other does not
d) one undergoes refraction, the other does not
e) blue light is a beam of photons. Microwaves are not photons
See llink midway down page;
Roger S is right...the correct answer is 'a'
So-called blue light and microwaves are both part of the electromagnetic spectrum (..light..) and move at the same velocity. Only their frequencies and wavelengths are different.
a because mirowaves and blue light are both waves but one is light waves and the other is like a heat wave