Question

Calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5.49 × 1014 hz. calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5.49 × 1014 hz. 3.64 × 10-19 j 4.68 × 10-19 j 1.83 × 10-19 j 2.75 × 10-19 j 5.46 × 10-19 j

Answer 1

The energy of a single photon is given by:
$E=hf$
where
E is the energy
h is the Planck constant
f is the frequency of the light

The light in our problem has a frequency $f=5.49 \cdot 10^{14}Hz$, so the energy of each photon of that light is:
$E=hf=(6.6 \cdot 10^{-34} Js)(5.49 \cdot 10^{14} Hz)=3.64 \cdot 10^{-19} J$