# A Challenging Problem for Measurement of Luminous Flux (Photometry)

**Geometry**Level pending

A right triangle ABC (AB=BC) is removed from a circle with a radius R & center at the origin O. A point-source of light is located at a point P(0,0,h). If the point-source emits total 1400 lm (lumen) luminous flux uniformly in all the directions then find out the total luminous flux (in lm) intercepted by the shaded portion of the circular plane.

(Take R ⁄ h=2.5)

(Take R ⁄ h=2.5)

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