Question

Focal-length of parallel sided glass slab is​

Answer 1

Answer:

Its focal length is 22 cm. A glass slab of refractive index 1.

Answer 2

Focal-length of a parallel-sided glass slab is​ infinite

Explanation:

• If the parallel beam of rays is passed through-plane glass plate, they will emerge in the form of a parallel beam.
• The beam does not converge, hence it is known to be that they converge at infinity. Hence, the focal length of plane glass plane is infinite
• Parallel sided glass slab has infinite focal length and radius of curvature.
• Here parallel sides glass slab with thickness 4 cm is made of a material of refractive index 3 then When light is incident on one of the parallel faces at an angle of 60, here the faces emerge from the other parallel face and then the lateral displacement of the emergent beam.
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