A beam of light incident on a convex lens parallel to its principal axis converges at a point on the principal axis. Name the point :

First focus

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Second focus

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First centre

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Second centre

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Solution

The correct option is B Second focus
Second principal focus is the point where rays travelling parallel to principal axis meet after they pass through the convex lens.

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A beam of light incident on a convex lens parallel to its principal axis converges at a point on the principal axis. Name the point :

The correct option is B Second focusSecond principal focus is the point where rays travelling parallel to principal axis meet after they pass through the convex lens.

The correct option is B Second focus
Second principal focus is the point where rays travelling parallel to principal axis meet after they pass through the convex lens.