Q. 45.0( 2 Votes )

A bulb is hanging

Class 11th HC Verma - Concepts of Physics Part 1 22. Photometry

Answer :

The value of the illuminance observed is maximum below the bulb, because light falls normally just below the table.

The illuminance on the table increase when a plane mirror is placed above the bulb facing the table. This is observed because the radiant flux increases due to the plane mirror.

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