Physics · Laser Physics
In a He-Ne laser, the energy spacing between the upper and lower laser levels in the Neon atom is E2 - E1 = 2.26 eV. If the optical pumping operation stops, the temperature at which the ratio of the population of the upper level to the lower level (N2/N1) becomes 1/10 is approximately: (Take Boltzmann constant kB = 8.617 × 10-5 eV/K)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11.14 × 104 K✓
- 22.23 × 103 K
- 38.40 × 104 K
- 46.25 × 103 K
Correct answer
1.14 × 104 K
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