
#1
Feb1112, 05:31 AM

P: 276

I have an example class yesterday, but one question troubled me.
In part (b), why does E=nhf? For me, it seems E=nh is enough, why does the equation involve frequency f after quantization? 



#2
Feb1112, 07:44 AM

P: 276

One answer might be: The unit of E (energy) is a Joule, the unit of h (Plank's constant) is Joule time a second. If you want the equation to be correct you need to multiply h with something that has units of 1 over a second.
Roman. 



#3
Feb1112, 05:42 PM

P: 103





#4
Feb1112, 06:36 PM

P: 22

Dose E=hn means quantization of energy?
h = energy per cycle.
f = number of cycles per unit of time. your quantization must include a quantization of time. 



#5
Feb1112, 07:33 PM

P: 276

Thanks! I have forgotten to consider the unit.




#6
Feb1212, 09:02 PM

P: 198

Energy within a single system is quantized, but there are different energies that result from following the E=nh model in different systems, so if you consider every possible system energy is continuous, just like the light spectrum.



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