A human astronomer at a latitude of 42 degrees north must tilt a telescope down

Question

A human astronomer at a latitude of 42 degrees north must tilt a telescope down 48 degrees from the vertical to observe the North Star. How from down from the vertical must a fish astronomer tilt a telescope to observe the North Star ? The index of refraction of wAter is n=1.33 A human astronomer at a latitude of 42 degrees north must tilt a telescope down 48 degrees from the vertical to observe the North Star. How from down from the vertical must a fish astronomer tilt a telescope to observe the North Star ? The index of refraction of wAter is n=1.33

Explanation / Answer

Using Snells Law

sin i /sin r = n

Where i is angle of incidence

r is angle of refraction

n is refractive index

sin 48/sin r = 1.33

r = 33.97o from vertical

Which is the required tilt for fish astronomer

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