Doppler Shift: The H (hydrogen beta) line, which isstrong in the spectra of mode

Question

Doppler Shift: The H (hydrogen beta) line, which isstrong in the spectra of moderately hot stars, has a wavelength of 486.133 nm in thelaboratory (i.e., at rest with respect to the observer). What wavelength (nm) wouldwe observe the H line on Earth if it were emitted by a star: a) moving at a speed of 130 km/s away from Earth? b) moving at a speed of 80 km/s towards Earth? Doppler Shift: The H (hydrogen beta) line, which isstrong in the spectra of moderately hot stars, has a wavelength of 486.133 nm in thelaboratory (i.e., at rest with respect to the observer). What wavelength (nm) wouldwe observe the H line on Earth if it were emitted by a star: a) moving at a speed of 130 km/s away from Earth? b) moving at a speed of 80 km/s towards Earth?

Explanation / Answer

I believe the doppler equation is: f = f0 *((1+)/(1-)) = v/c f = c/ so, = c/f Convert the equation from frequency to wavelength and plug in thevalues they give.

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