Question

red light has a wave length of 684nm. what is its frequency

Answer 1

speed of light = wavelength * frequency
3*10^8= 684*10^-9* frequency

Answer 2

\[3*10^8=648*10^{-9}*frequency\]

Answer 3

@ghazi is very correct........... can u explain it PLZ

Answer 4

@sauravshakya do you want me to explain?

Answer 5

Yep........ I think he didnt understand

Answer 6

i want an explanation....

Answer 7

consider this example If a wave with a wavelength of 2 meters is going by at a speed of 6 meters/second, then 3 complete waves go by in 1 second. That is, the frequency is 6/2 = 3 waves/second, or 3 Hz. therefore frequency = speed/ wavelength