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Use the Hubble Law for the expansion of the Universe (Destination 16) to answer the following...

Use the Hubble Law for the expansion of the Universe (Destination 16) to answer the following questions. a) What is the distance to a galaxy with a recession velocity of 8,000 km/s for an assumed Hubble constant of 62 km/s/Mpc?

b) You measure the distance to a galaxy to be 64 Mpc and its recession velocity is 7,800 km/s. What Hubble constant would you derive from this galaxy?

c) What is the distance to a galaxy for which you measure the Hydrogen-beta line to be at 539 nm? The normal wavelength of this line is 486 nm and you can assume a Hubble constant of 70 km/s/Mpc. Use the Doppler Equation: Δ?/? = ?/?, where Δ? is the dif- ference between the observed and true wavelength of the emission line, V is the reces- sion velocity of the galaxy, and c is the speed of light.

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