Question

Activity 26-2. Photons II [Accompanies Section 26-2] >k Range of visible frequencies 11 The illustration shows the Red || Violet spectrum of electromagnetic 11 11 radiation emitted by a Blackbody spectrum for higher temperature blackbody at two different Intensity per frequency interval Kelvin temperatures. The range of visible frequencies (those that can be detected by the human eye) is also shown. Blackbody spectrum for ilower temperature Frequency f 0 (a) No matter what the value of the Kelvin temperature T, the spectrum decreases to zero at very high frequencies. Why is this? (i) At very high frequencies the photon energy is very small compared to KT. (ii) At very high frequencies the photon energy is very large compared to KT. (ii) At very high frequencies there are very few standing wave patterns in a blackbody cavity. (iv) Both (i) and (iii) are true. (v) Both (ii) and (iii) are true.
The illustration shows the spectrum of electromagnetic radiation emitted by a blackbody at two different Kelvin temperatures. The range of visible frequencies (those that can be detected by the human eye) is also shown. (a) No matter what the value of the Kelvin temperature T, the spectrum decreases to zero at very high frequencies. Why is this? (i) At very high frequencies the photon energy is very small compared to kT. (ii) At very high frequencies the photon energy is very large compared to kT. (ii) At very high frequencies there are very few standing wave patterns in a blackbody cavity. (iv) Both (i) and (iii) are true. (v) Both (ii) and (iii) are true.

Answer 1

the- The figure of Eleutyomagnubic Radialions eruitted by a Black body at two difreyet keluin Terep. Intuity → Highey Temp. lower T 19) f No matter what the value of the keluin Temp., The spectrum decreases to zeyo at high heq. at very High heq dey using plank Radiation Low- Ouodus 8003h.do 13 Cerpen D-] Explore the hv КТ Une do C3 Brbu? Exploring.de High hell. f . t 1 T 1 & dd / if photon Ency is very Simold compared to the KT - hec if &= hi High Then KT will be High also. small I Larger. b= hva

jo if we compared The photon ency with The KT , That does not having mean. at very High heq. it can be possible that very few standing wave patteyen Inside cavity.