What is the frequency of a wave of red light in the air where its wavelength is 6.8×10−7m?

1 Answer
Jul 1, 2018

Approximately #4.41*10^14# meters.

Explanation:

Frequency of a photon is given by the equation:

#f=c/lambda#

where:

  • #f# is the frequency in hertz #(1 \ "Hz"-=1 \ "s"^-1)#

  • #c# is the speed of light, which is approximately #3*10^8 \ "m/s"#

  • #lambda# is the wavelength in meters

So, we get:

#f=(3*10^8color(red)cancelcolor(black)"m""s"^-1)/(6.8*10^-7 color(red)cancelcolor(black)"m")#

#~~4.41*10^14 \ "m"#