Classical theory and Experimental graph (1 Viewer)

[Atef]

Can someone explain this to me ?

 

[sharoooooo]

Classical physics shows that as wavelength of a wave decreased, the radiation intensity (hence Energy) increased due to their inverse relationship.
Experimentally, that'd mean that as a black body got hotter, a graph of intensity against wavelength would rise to infinity, as shown by the classical theory vs experimental graph. http://titan.bloomfield.edu/facstaff/dnicolai/images/ImagesPhy106/Chapter%2016/lesson34.jpg

However, this violates the Law of Conservation of Energy since we don't have infinite amount of energy. So therefore, experiments showed that black body radiation graphed a curve which didn't match what Classical physics predicted; thus, leading to Planck's hypothesis of quanta and Planck's constant.

Hope this helps

 

[Atef]

so for the experimental graph the intensity reaches a maximum peak and then sharply drops for a smaller wavelength and hence the radiation is greater ?

 

[addybrah]

basically yeah, radiation emitted/intensity ratio is maximum at the peak wavelength, less radiation (with less intensity) is emitted at any other wavelength