The eyes of a certain member of the reptile family pass a single visual single to the brain when the — Atomic Structure Chemistry Question
Question
The eyes of a certain member of the reptile family pass a single visual single to the brain when the visual receptors are stuck by photons of wavelength 662.6 nm. If a total energy of $3.0 \times 10^{-14}$ J is required to trap the signal, what is the minimum number of photons that must strike the receptor?
Answer: A
💡 Solution & Explanation
Energy of one photon $E = \frac{hc}{\lambda} = \frac{6.626 \times 10^{-34} \times 3 \times 10^8}{662.6 \times 10^{-9}} = 3 \times 10^{-19}$ J. Total energy $= nE \implies 3.0 \times 10^{-14} = n \times 3 \times 10^{-19} \implies n = 10^5$. Therefore, correct answer is A.
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