A parallel beam of light is incident on a covering lens parallel to its principal axis. As one moves away from the lens on the other side on its principal axis, the intensity of light:

Remains constant

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Continuously increases

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Continuously decreases

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First increases then decreases.

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Solution

The correct option is D First increases then decreases.
Intensity first increases up to the focus and then decreases beyond the focus.

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A parallel beam of light is incident on a covering lens parallel to its principal axis. As one moves away from the lens on the other side on its principal axis, the intensity of light:

The correct option is D First increases then decreases.Intensity first increases up to the focus and then decreases beyond the focus.

The correct option is D First increases then decreases.
Intensity first increases up to the focus and then decreases beyond the focus.