A galaxy has a redshift of z = = 0.15 and you are asked to determine the wavelengths atwhich its Call H and K lines would appear in the observed spectrum. The rest-framewavelengths of the Call H and K lines are o 3968.5 Å and 3933.6 Å, respectively.NOTE: assume H₁ = 72 kms¯¹ Mpc¯¹.=(a) Calculate the observed wavelengths for the Call H and K lines.(b) What is the velocity of recession for this galaxy and it's distance in Mpc?

Part (a): Calculating the observed wavelengthsThe redshift 'z' is defined as the ratio of the change…

Answered: A galaxy has a redshift of z = = 0.15…

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