If light source is at focus of concave lens, then after refraction the ray of light will __.

parallel to principal axis

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will appear to be parallel to principal axis

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will never be parallel to principal axis

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cannot be said

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Solution

The correct option is C
will never be parallel to principal axis

By drawing normal at both the curved surfaces and following Snell's law we see the rays are becoming even more divergent and not parallel.

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Similar questions

A ray starting from the focus of a concave lens becomes parallel to the principal axis after refraction.

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