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Radiation and Dual Nature of Matter — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsRadiation and Dual Nature of Matter2 Marks
Question
Energy of a photon is 7.5 eV. Find its frequency.
✓

Answer

Energy of photon $ E=hv $
∴ Frequency of photon $ v=\frac{E}{h} $
$ =\frac{2.5\times10^{-19}Joule}{6.6\times10^{-34}Joule~second} $
$ =6.06\times10^{14}s^{-1}=6.06\times10^{14}Hz $

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