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

Answer:

Energy of 1 photon = hv= hc/ λ = (6.626x10^-34)(3x10⁸) / 600x10^-9 = 3.313 x 10^-19J

Total energy received = 3.15 x10^-8J

Therefore no of photons received = 3.15x10^-18/ 3.313x10^-19 = 9.51

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

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

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