Question #65e56

1 Answer
Nedžma A. · Stefan V.
Oct 24, 2017

#E=h*c/(lambda)#

Explanation:

Both #h# and #c# are constants:

  1. #h# (Planck's constant): #6.626 *10^(-34)# #"J s"#
  2. #c# is the speed of light in vacuum: #3 * 10^8# #"m/s"#
  3. convert nanometers to meters: one nanometer is equal to #10^(-9)# meters

So

#E= (3 * 10^8"m/s" * 6.626 * 10^(-34)"J s")/(305*10^(-9)"m") = 6.52 *10^(-19)# #"J"#

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