Physics · Electromagnetic Waves

If a 10 W bulb emits electromagnetic waves uniformly in all directions, then the intensity of light at a distance of 0.5 m from the source is nearly:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

15 W m-2
20.62 W m-2
30.31 W m-2
43.18 W m-2✓

Correct answer

3.18 W m-2

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If a 10 W bulb emits electromagnetic waves uniformly in all directions, then the intensity of light at a distance of 0.5 m from the source is nearly:

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If a 10 W bulb emits electromagnetic waves uniformly in all directions, then the intensity of light at a distance of 0.5 m from the source is nearly:

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