Light in a vacuum is incident on a transparent glass slab. The angle of incidence is
39.5\deg
. The slab is then immersed in a pool of liquid. When the angle of incidence for the light striking the slab is
23.7\deg
, the angle of refraction for the light entering the slab is the same as when the slab was in a vacuum. What is the index of refraction of the liquid? Number
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Units
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