JAMB - Physics (1984 - No. 37)
Radio waves have a velocity of 3 x 108ms-1. A radio station sends out a broadcast on a frequency of 800kHz. The wavelength of the broadcast is
375.0m
267.0m
240.0m
37.5m
26.7m
คำอธิบาย
v = F\(\lambda\)
3 x 108 = \(\lambda\) x 800 x 103
\(\lambda\) = 375.0m
3 x 108 = \(\lambda\) x 800 x 103
\(\lambda\) = 375.0m