1B.15

$E=hv$

304976622
Posts: 25
Joined: Wed Nov 15, 2017 3:01 am

1B.15

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; (b) 5.00 mg of sodium atoms emitting light at this wavelength; (c) 1.00 mol of sodium atoms emitting light at this wavelength?

I'm having trouble with part a could someone help please.

Bilal Pandit 1J
Posts: 98
Joined: Wed Sep 11, 2019 12:16 am

Re: 1B.15

You can use the c = lambda nu, and then use E = kv to get the energy.

nshahwan 1L
Posts: 100
Joined: Fri Aug 30, 2019 12:18 am

Re: 1B.15

Im confused as well. Why would we use E=hv for this one?

nshahwan 1L
Posts: 100
Joined: Fri Aug 30, 2019 12:18 am

Re: 1B.15

also for part d ((d) What kind of electromagnetic radiation was used?) would we need to know something like this for the midterm?