In astronomical observations, signals observed from the distant stars are generally weak. If the photon detector receives a total of 3.15 x 10-18 J from the radiations of 600 nm, calculate the number of photons received by the detector.

Energy of one photon, E = hν = 6.626 x 10-34Js) x (3 x 108 / 2 ms-1) / 600 x 10-9 = 3.31 x 10-19 JNo. of photons = (3.15 x 10-18) / 3.31 x 10-19 = 9.52 ≈ 10.

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Ncert Solutions Chemistry Class 11th Chemistry Class 11th Structure of Atoms

In astronomical observations, signals observed from the distant stars are generally weak. If the photon detector receives a total of 3.15 x 10^-18 J from the radiations of 600 nm, calculate the number of photons received by the detector.

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alok kumar singh | Contributor-Level 10

3 months ago

Energy of one photon, E = hν = 6.626 x 10^-34Js) x (3 x 10⁸ / 2 ms^-1) / 600 x 10^-9

= 3.31 x 10^-19 J

No. of photons = (3.15 x 10^-18) / 3.31 x 10^-19= 9.52 ≈ 10.

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