A star is known to be moving at 8.46km/s toward the earth. If you observe the spectral line to be at 5.02nm, at what wavelength would you expect to measure the spectral line in a lab?

Explanation:

From the question we are told that

Speed of star

Distance of spectral line

Generally the equation for wavelength with respect to spectral lines is mathematically given by

where

therefore

Generally the equation for new wavelength is mathematically given as

Therefore

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach