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Lens Maker's Formula

If the glass ...

Question

If the glass slab is of the following shape , and the experiment is performed as above , will the effects be same ? Here $S_{1}$ and $S_{2}$ are slab surfaces parallel to each other.

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Solution

In a glass slab opposite sides are parallel. The angle of refraction becomes the angle of incidence in the second face. The emergent ray bends in such a way that the angle of incidence becomes the angle of emergence. In this case the incident ray and the emergent ray will not be parallel to each other.

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λ_{1}

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Q. A glass slab has two long parallel faces. Light ray is incident on the glass slab and trace of light ray is drawn. Now glass slab is shifted parallel to the parallel faces. What will be the effect on the trace of light?

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