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NEET 2000 (AIPMT) · Photons: Energy, Momentum & Radiation Pressure

Photons: Energy, Momentum & Radiation Pressure question from NEET 2000 (AIPMT)

Q42NEET 2000 · AIPMTEasy

Photons: Energy, Momentum & Radiation Pressure

The energy of a photon of light is $3\text{ eV}$ . Then the wavelength of photon must be

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Answer: (b)

$\lambda = \frac{hc}{E}$ with $hc \approx 12375\text{ eV Å}$ .
$\lambda = \frac{12375}{3}\text{ Å} = 4125\text{ Å} = 412.5\text{ nm}$
So the answer is (b) $412.5\text{ nm}$ .

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