Model a cancer cell as a circular disk 5.0 um in diameter, and let the light pulse last for 4.0 ns with a power of 2.0 × 10¹2 W. Assume that the energy is spread uniformly over the face of one cancer cell for each pulse. a. How much energy is given to the cell during this pulse? Show your calculation. b. What is the intensity (in W/m²) delivered to the cell? Show your calculation. c. What are the maximum values of the electric and magnetic fields in the pulse? Show your calculation, and don't forget units!
Model a cancer cell as a circular disk 5.0 um in diameter, and let the light pulse last for 4.0 ns with a power of 2.0 × 10¹2 W. Assume that the energy is spread uniformly over the face of one cancer cell for each pulse. a. How much energy is given to the cell during this pulse? Show your calculation. b. What is the intensity (in W/m²) delivered to the cell? Show your calculation. c. What are the maximum values of the electric and magnetic fields in the pulse? Show your calculation, and don't forget units!
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Transcribed Image Text:3. A potential technique to kill cancer cells by zapping them with ultrahigh-energy pulses of light
that last for an extremely short amount of time. These short pulses scramble the interior of a cell
without causing it to explode, as long pulses do. See details at https://www.cancer.gov/about-
cancer/treatment/types/surgery/lasers-fact-sheet
Model a cancer cell as a circular disk 5.0 um in diameter, and let the light pulse last for 4.0 ns
with a power of 2.0 × 10¹2 W. Assume that the energy is spread uniformly over the face of one
cancer cell for each pulse.
a. How much energy is given to the cell during this pulse? Show your calculation.
b. What is the intensity (in W/m²) delivered to the cell? Show your calculation.
c. What are the maximum values of the electric and magnetic fields in the pulse? Show your
calculation, and don't forget units!
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