Homework Answers
The refractive index (n) is the ratio c/s where s is the speed of light in a medium and c is the speed of light in vacuum.
Since distance (d) is proportional to speed we can write (for
ice)
c/si = 1.309 = dv/2.01 where subscripts v
& i refer to vacuum and ice respectively.
dv = 2.63cm this is the distance the light would travel
in vacuum in the same time it would take to travel in the 2.01 cm
ice. (optical path).
similarly, for quartz, dv = 1.37
1.544=
2.11cm.
total distance in vacuum = 2.63+2.11= 4.74 cm.
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