blackbunny
Member
- Joined
- Mar 17, 2004
- Messages
- 466
- Gender
- Male
- HSC
- 2004
I don’t understand how did the quantisation of energy explained the radiation curves for black body
-
Best of luck to the class of 2024 for their HSC exams. You got this! Let us know your thoughts on the HSC exams here -
YOU can help the next generation of students in the community! Share your trial papers and notes on our Notes & Resources page
How did quanta explained black body curves (1 Viewer)
- Thread starter blackbunny
- Start date
Tommy_Lamp
Coco
its complicated, you dont need to know how i think, just that it did
The UV catastrophe is the drop off in energy at the high frequency, low wavelengths.
Plank came up with his law to mathematically model the curve but did not understand the meaning.
By the idea of quanta you need to remember the whole or nothing principle.
For a UV quanta to be released a large amount of radiation is required at one instant in time. Statistically this is not going to occur very often, so there are few of these quanta produced and for this reason little radiation of high f.
Plank came up with his law to mathematically model the curve but did not understand the meaning.
By the idea of quanta you need to remember the whole or nothing principle.
For a UV quanta to be released a large amount of radiation is required at one instant in time. Statistically this is not going to occur very often, so there are few of these quanta produced and for this reason little radiation of high f.
Xayma
Lacking creativity
- Joined
- Sep 6, 2003
- Messages
- 5,953
- Gender
- Undisclosed
- HSC
- N/A
The UV catastrophe was the classical theories problem, the idea that as the shorter the wavelength the more radiance there should be reaching the problems of infinities.
Some drops are more likely to occur then other, such as the brighter lines in the hydrogen spectrum.
The highest drop however is limited by the escape energy required in hydrogen this is 13.6eV
The smallest change is near 0 since they normally move a little in the shells, which accounts for the trailing off.
Some drops are more likely to occur then other, such as the brighter lines in the hydrogen spectrum.
The highest drop however is limited by the escape energy required in hydrogen this is 13.6eV
The smallest change is near 0 since they normally move a little in the shells, which accounts for the trailing off.
blackbunny
Member
- Joined
- Mar 17, 2004
- Messages
- 466
- Gender
- Male
- HSC
- 2004
So from what I know now, to explain how it is possible to release low energy at high f there are just not many quanta. Meaning like 1 dose of high radiation (low temp) will not get u killed but a lot (lots of quanta) will. So there are basically not enough matches (quanta) to light the fire (give off high temperature) 
i thought it was something to do with the size of the energy packets being so small that once reached a certain wavelength cant get any smaller and hence the radiance (intensity) of the curve must drop back down...but im not sure
can anyone confirm this?
can anyone confirm this?
snoopwogg
Member
aAs the temperature became hotter, the walls of the cavity absorbed many packets of energy and released them as one bigger bundle of energy with a higher frequency. hence, the intensity of those bundles decreased as the frequency increased. That is, a smaller number of protons have larger energies, correspoing to lower intensities.
