E= hc/wavelength.
h is Planck's constant.
C is light velocity = 3E8 m/s
wavelength is 489 nm convert to m.
I wonder if you meant 589 and not 489?
sodium vapor lamps, used for public lighting, emit 489nm yellow light. what energy is emitted by:
(a) an excited sodium atom when it generates a photon?
(b) 1 mol of excited sodium atoms at this wavelength?
1 answer
1 answer