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Karnataka Board PUCPUC Science Class 11

Light from a Point Source Falls on a Small Area Placed Perpendicular to the Incident Light.

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Question

Light from a point source falls on a small area placed perpendicular to the incident light. If the area is rotated about the incident light by an angle of 60°, by what fraction will the illuminance change?

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Solution

If the area is rotated about the incident light by any angle, the illuminance will not change.

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Light Process and Photometry
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Chapter 22: Photometry - Exercise [Page 455]

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HC Verma Concepts of Physics Volume 1 and 2 [English]
Chapter 22 Photometry
Exercise | Q 12 | Page 455
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