what is the energy of radiation given off by a sodium lamp which has a wavelength of 589.2nm?
Using Max Plank’s Quantum Theory:
E = h.c/v
where E is the energy
h is Plank’s constant (6.63 x 10^-34 J.s)
(times ten to the power of negative thirty-four)
c is the speed of light (3 x 10^8 m/s)
(times ten to the power of eight)
v(lamda) is the wavelength (m)
First, 589.2 nm = 5.892 x 10^-7 m
So, E = (6.63 x 10^-34 J.s)(3 x 10^8 m/s)/(5.892 x 10^-7 m)
= 3.37576 x 10^-19 J
(3.37576 times ten to the power of nineteen joules)
The The – Sodium Light Baby
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