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Chapter 4: Q7DQ (page 1072)

The light beam from a searchlight may have an electric field magnitude of 1000 V>m, corresponding to a potential difference of 1500 V between the head and feet of a 1.5-m-tall person on whom the light shines. Does this cause the person to feel a strong electric shock? Why or why not?

Short Answer

Expert verified

Electromagnetic waves have a weak intensity, so the answer is no.

Step by step solution

01

Formula for intensity of wave.

The intensity of a wave is calculated by the power of the wave divided by the area of the cross section

02

Conclusion.

The intensity of the wave will be Imax=1/2蔚0cEmax2=0.3W/cm2. It is very less intensity to induce any electrical shock to a person.

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