Physics-
General
Easy

Question

About 5% of the power of a 100 W light bulb is converted to visible radiation. The average intensity of visible radiation at a distance of 1 m from the bulb:

  1. 0.4W/m2    
  2. 0.5 W/m2    
  3. 0.6 W/m2    
  4. 0.8 W/m2    

The correct answer is: 0.4W/m2

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