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Grade upto college level Wave Optics

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?

Profile image of Shane Macguire
12 Years agoGrade upto college level
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1 Answer

Profile image of Jitender Pal
12 Years ago
Sol. The illuminance will not change

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