A krypton laser produces a cylindrical red laser beam 3mm, Ask an Expert

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Q. A 100 W light bulb produces 4W of visible light.

(a) What is the light intensity on a wall 3m away from the light bulb?
(b) Where did the 96 W go?
(c) A krypton laser produces a cylindrical red laser beam 3mm in diameter with 4W of power.
What is the light intensity on a wall 5.0 m away from the laser?

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Category:- Physics
Reference No.:- M9220279

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