Complete the third example on your own. Assume that the blue light received by the earth has a frequency of $700$ THz $($THz $=1012$ Hz$).$ Assume that the earth is stationary relative to the receding galaxy.

When applying the doppler equation, which variable should the $700$ THz be substituted for?

Question $4$ options:

a$)$

f

b$)$

f$\text{'}$

c$)$

v

d$)$

v$0$

Question $5(1$ point$)$

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When applying the doppler equation, what value should be used for$$v$?$

Question $5$ options:

a$)$

$0$ m$/$s

b$)$

$343$ m$/$s

c$)$

$2\mathrm{.}7$ x $108$ m$/$s

d$)$

$3\mathrm{.}0$ x $108$ m$/$s

Question $6(1$ point$)$

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Determine the frequency of the light originally emitted by the galaxy. Answer in THz$.$