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The Typical Speed of Spicular Material Traveling Outward from the Photosphere

Question 194

Multiple Choice

The typical speed of spicular material traveling outward from the photosphere in the direction of Earth is 20 km/s. What would be the observed wavelength of the Balmer H α\alpha hydrogen spectral line emitted by this gas compared with that from stationary solar material?


A) There will be no shift since the light is emitted by hydrogen gas in both the spicule and the stationary solar material.
B) 0.044 nm longer than the H α\alpha from stationary solar material
C) 0.000067 nm shorter than the H α\alpha from the stationary solar material
D) 0.044 nm shorter than the H α\alpha from stationary solar material

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