Electromagnetic radiations of frequency nu co | vedclass

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Question

(D) The energy of a single photon is given by $E = h
u$. For a given beam of light with total energy $E_{total}$,the number of photons $n$ is given b

Vedclass · Accepted Answer

Both $(b)$ and $(c)$

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(D) The energy of a single photon is given by $E = h
u$. For a given beam of light with total energy $E_{total}$,the number of photons $n$ is given by $n = E_{total} / E = E_{total} / (h
u)$. $1$. If the intensity (total energy per unit area per unit time) increases while frequency $
u$ remains constant,the number of photons $n$ increases. Thus,statement $(b)$ is true. $2$. The number of photons $n$ is inversely proportional to the frequency $
u$ for a fixed total energy. However,if we consider a beam of fixed intensity,the number of photons is indeed independent of the frequency if we define intensity as the number of photons per unit area per unit time. In standard physics contexts,intensity is proportional to the number of photons. $3$. Therefore,statement $(b)$ is correct,and statement $(c)$ is also considered correct in the context of photon flux density.

Electromagnetic radiations of frequency $\nu$ consist of a stream of particles called photons. Which of the following statements is / are true about photons:

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