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Chapter 4: Q9DQ (page 1072)

The magnetic-field amplitude of the electromagnetic wave from the laser described in Example 32.1 (Section 32.3) is about 100 times greater than the earth’s magnetic field. If you illuminate a compass with the light from this laser, would you expect the compass to deflect? Why or why not?

Short Answer

Expert verified

No deflection as the frequency and intensity of light is very low.

Step by step solution

01

Frequency of light.

The frequency of field of light is1015Hz

02

Conclusion.

Since the mass of the compass needle is high, it would require a higher current to deflect the needle.

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Most popular questions from this chapter

The capacity of a storage battery, such as those used in automobile electrical systems, is rated in ampere-hours .(A‐h)‐A50A‐hA battery can supply a current of50Afor 1.0h,or25Afor2.0hor for and so on. (a) What total energy can be supplied by a 12-v,60-A‐hbattery if its internal resistance is negligible? (b) What volume (in litres) of gasoline has a total heat of combustion equal to the energy obtained in part (a)? (See Section 17.6; the density of gasoline is 900kg/m3.) (c) If a generator with an average electrical power output ofrole="math" localid="1655719210000" 0.45kW is connected to the battery, how much time will be required for it to charge the battery fully?

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