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Q. 45

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 903

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Short Answer

Assume that a -diameter, light bulb radiates all its energy as a single wavelength of visible light. Estimate the electric and magnetic field strengths at the surface of the bulb.

At surface of the bulb,

Electric field strength is .

Magnetic field strength is .

See the step by step solution

Step by Step Solution

Step 1: Calculation for intensity

Given info:

Diameter is .

Power is .

Intensity is,

Where,

Power

Step 2: Calculation of Electric field strength

Electric field is,

Step 3: Calculation for magnetic field strength

Magnetic field is,

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