Answered: A 525 nm photon emitted by a distant…

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A 525 nm photon emitted by a distant galaxy is observed to be 890 nm. Estimate the redshift of the galaxy.

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Question

A 525 nm photon emitted by a distant galaxy is observed to be 890 nm. Estimate the redshift of the galaxy.

Expert Solution

Concept and Principle:

Redshift takes place when the source of electromagnetic radiation moves away from the observer. This shifts the wavelength to the red side and will decrease the frequency.

Redshift can be calculated from wavelength using the following formula,

$z = \frac{λ_{obs} - λ_{emit}}{λ_{emit}}$

Here λ_obs is the observed wavelength and λ_emit is the emitted wavelength.

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