Chapter 9 Question

Question

Consider the light that appears orange to our eyes and has a frequency of about 5.00x10¹⁴ Hz (i.e. a wavelength of about 600 nm). What is the energy in Joules of the photons associated with this light? 

Answer 1

Hello,

The energy associated with a single photon is given by E = hv, where E is the energy (joules), h is Planck's constant (h = 6.626 x 10^-34 joule-seconds), and v is the frequency of the radiation (seconds^-1, or Hertz).

E (J) = (6.262 x 10^-34 joule-seconds)(5.00 x 10^14 seconds^-1)

The units of seconds cancel out and we are left with the answer in joules, 3.313 x 10^-19 J.