Scientists are workingon a new technique to kill cancer cells by zapping them with ultrahighenergy(in the range of 1012 W) pulses of light that last for an extremelyshort time (a few nanoseconds). These short pulses scramble the interiorof a cell without causing it to explode, as long pulses would do. We canmodel a typical such cell as a disk 5.0 mm in diameter, with the pulselasting for 4.0 ns with an average power of 2.0 * 10^12 W. We shall assumethat the energy is spread uniformly over the faces of 100 cells foreach pulse. (a) How much energy is given to the cell during this pulse?(b) What is the intensity (in W/m2) delivered to the cell? (c) What arethe maximum values of the electric and magnetic fields in the pulse?
Scientists are working
on a new technique to kill cancer cells by zapping them with ultrahighenergy
(in the range of 1012 W) pulses of light that last for an extremely
short time (a few nanoseconds). These short pulses scramble the interior
of a cell without causing it to explode, as long pulses would do. We can
model a typical such cell as a disk 5.0 mm in diameter, with the pulse
lasting for 4.0 ns with an average power of 2.0 * 10^12 W. We shall assume
that the energy is spread uniformly over the faces of 100 cells for
each pulse. (a) How much energy is given to the cell during this pulse?
(b) What is the intensity (in W/m2) delivered to the cell? (c) What are
the maximum values of the electric and magnetic fields in the pulse?
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