Question:
The wavelengths of two photons are 2000Å and 4000Å, respectively. What is the ratio of their energies?
The wavelengths of two photons are 2000Å and 4000Å, respectively. What is the ratio of their energies?
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The energy of a photon is inversely proportional to its wavelength.
Updated On: Jan 12, 2026
- \( \frac{1}{4} \)
- 4
- \( \frac{1}{2} \)
- 2
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The Correct Option is B
Solution and Explanation
The energy of a photon is inversely proportional to its wavelength, given by:
\[
E = \frac{hc}{\lambda}
\]
Since the wavelength of the second photon is twice that of the first, the energy ratio is \( E_1/E_2 = (4000/2000) = 2 \), so the energy ratio is 4.
Final Answer: \[ \boxed{4} \]
Final Answer: \[ \boxed{4} \]
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