How should a ray of light be incident on a rectangular glass slab so that it omes out from the opposite side of the slab without being dispaced?
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at 0 degree from normal
ok hope u got it
ok hope u got it
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'A ray of light' should be perpendicular to the surface so that it can come out of the other side without being displaced.
EXPLANATION:
The ray of light should come out of the 'glass slab' without changing its direction i.e. without being displaced. This means that the ray of light must fall on the glass surface with an 'angle of incidence' equal to 0 degrees. This happens only when the ray of 'light is perpendicular' to surface of glass.
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