A typical Doppler shift in the center of a granular cell compared to the "rest" wavelength is 8.75 X 10-⁴ nm.Take the rest wavelength to be the Hα line of 656 nm.What is the corresponding material speed in the center of the cell?

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Quizplus · Accepted Answer

The Doppler shift formula for wavelength is Δλ/λ = v/c, where Δλ is the shift, λ is the rest wavelength, v is the velocity, and c is the speed of light (approximately 3 x 10^8 m/s). Solving for v gives v = (Δλ/λ) * c. Substituting the given values: v = (8.75 x 10^-4 nm / 656 nm) * 3 x 10^8 m/s = 0.4 km/s.

A Typical Doppler Shift in the Center of a Granular