1.25 [ENDORSED]

$c=\lambda v$

Alondra Juarez section 1E
Posts: 47
Joined: Fri Sep 29, 2017 7:03 am

1.25

Sodium vapor lamps used for public lighting, emit yellow light of wavelength 589 nm. how much energy is emitted by (a) an excited sodium atom when it generates a photon?
how would I approach this problem and what equation would I use?

Solene Poulhazan
Posts: 19
Joined: Fri Apr 06, 2018 11:04 am

Re: 1.25  [ENDORSED]

a)
wavelength = 589nm convert it to m, 5.89 x10^-7 m

Then, you can use the formula E= hc/wavelength

E = (6.626 x 10^-34)(2.99 x 10^8) / (5.89 x 10^-7)
= 3.37 x 10^-19 J