cse • paper_1 • waves_oscillations
[UPSC CSE 2025] Polarisation and Modern Optics (Q318, 10M)
For a \text{He}-\text{Ne} laser system, what will be the magnitude of \Delta\omega_D which represents FWHM of the line shape function g(\omega), if resonant frequency \omega_0 = 3 \times 10^{15}\text{ s}^{-1} and temperature T = 300\text{ K}?
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