Question

A radio wave might have a wavelength as long as a _____.

A. cup
B. house
C. puppy
D. molecule

Answer 1

... a football field, a supertanker, several miles, or anything longer.

-- The lowest number on your radio's AM dial is 55 or 550. It stands for the frequency of 550 KHz. The corresponding wavelength is 545 meters.

-- The US Navy operates a radio station in Maine that transmits on a frequency of 24.0 KHz. The corresponding wavelength is 12.5 Kilometers !