Mammoth Memory

Which is the principal focal divergent point?

Many rays of light reflect off every point of an object but which is the principal focal (divergent) point?

Many rays of light reflecting from an object and passing through a concave lens

Again, we emphasise that the principal focal (divergent) point is where light passing parallel to the principal axis passes through the concave lens and appears to diverge through the principal axis.

Parallel ray of light passing through a concave lens

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