The most intense light is emitted by the oxygen in ngc 7319


The most intense light is emitted by the oxygen in NGC 7319. In a laboratory that emission is at wavelength A = 513 nm, but in the light from NGC 7319 it has been shifted to 525 nm due to the Doppler effect (all the emissions from NGC 7319 have been shifted).

What is the radial speed of NGC 7319 relative to Earth?

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Econometrics: The most intense light is emitted by the oxygen in ngc 7319
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