Physics
A ray of light enters a glass slab ABDC as shown in figure and strikes at the centre O of the circular part AC of the slab. The critical angle of glass is 42°. Complete the path of the ray till it emerges out from the slab. Mark the angles in the diagram wherever necessary.
Refraction Plane Surfaces
ICSE
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Answer
Completed diagram showing the path of the ray till it emerges out from the slab is shown below:
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