Question

In a vacuum, electromagnetic radiation of short wavelengths......?
a. travels as fast as radiation of long wavelenghts.

b. travels slower than radiation of long wavelengths.

c. travels faster than radiation of long wavelengths.

d. can travel both faster than radiation of long wavelengths.

Answer 1

In vacuum the speed of electromagnetic radiation doesn't depend on its wavelength, so the answer would be
a) travels as fast as radiation of long wavelenghts.