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9. The main problem that physicists had in understanding blackbody radiation bef

ID: 3280991 • Letter: 9

Question

9. The main problem that physicists had in understanding blackbody radiation before Planck's work was: A) Blackbody radiation came from objects that were not actually black. B) The classically predicted frequency spectrum showed an infinitely large peak at low frequencies. C) The classically predicted frequency spectrum showed an infinitely large peak at high frequencies D) The classically predicted frequency spectrum had a minimum intensity rather than a maximum as observed E) The classically predicted frequency spectrum has a maximum intensity that decreased with temperature, rather thani

Explanation / Answer

C. Classically the formula between energy density and frequency had direct proportionality with no other factor to decrease the value at high frequencies.