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. A helium-neon laser emits a continuous beam of linearly polarized, sinusoidal, plane EM waves with a wavelength of 632.8 nm. However, to simplify our numbers, please use 600 nm for the wavelength in this problem. The laser light travels in the +x direction and at some instant of time the

. A helium-neon laser emits a continuous beam of linearly polarized, sinusoidal, plane EM waves with a wavelength of 632.8 nm. However, to simplify our numbers, please use 600 nm for the wavelength in this problem. The laser light travels in the +x direction and at some instant of time the

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15. A helium-neon laser emits a continuous beam of linearly polarized, sinusoidal, plane EM waves with a wavelength of 632.8 nm. However, to simplify our numbers, please use 600 nm for the wavelength in this problem. The laser light travels in the +x direction and at some instant of time the magnetic field of this wave points in the -z direction at point P. At which values) of time after this instant does the electric field at P point in the +y direction?

  1. 1 × 10-15 seconds
  2. 2 × 10-15 seconds
  3. 3 x 10-15 seconds
  4. more than one of the above times are correct
  5. more information is needed to determine which, if any, of the above times is correc
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