Calculate the luminous flux of a spotlight mounted on the ceiling at 45 degrees, having an intensity of 200cd, and lighting a religious icon mounted on a table 600mm from the floor. The height of the prayer room from floor to ceiling is 2400mm.

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Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.