The wavelength of a photon is 10A find its energy? 2

1 Answer
Mar 9, 2018

Photon energy E = # h.c/lambda# and approx. =0.12 eV

Explanation:

A photon is quanta of light/or electromagnetic waves.

the wavelength of light is related with its frequency

#f= c/lambda#

and the energy of a photon is equal to h.f
therefore the

photon's Energy #E= h.c /lambda#

h=Plank's Constant = 6.63. 10^-34 Js and

c = speed of light =3. 10^8 m/s

#lambda# = 10 #Angstrom# =10 . 10^-10 m

E= 19.89 . 10^-17 Joules

or in eV E =0.12 eV ( as i eV = 1.6. 10^-19 J )