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In an experiment with a rectangular glas...

In an experiment with a rectangular glass slab, a student observed that a ray of light incident at an angle of `55^(@)` with the normal on one face of the slab, after refraction struck the opposite face of the slab before emerging out into air making an angle of `40^(@)` with the normal.
What value would you assign to the angle of refraction?

Text Solution

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Angle of refraction at point A is `40^(@)`.
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