(a) Laser intensities are quoted in units of W/cm, and electric fields are quoted in units...

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(a) Laser intensities are quoted in units of W/cm², and electric fields are quoted in units of V/cm. (i) Give the numerical value of the electric field in a laser focus of 100 W/cm² intensity (a relatively low power laser focused gently), in a focus of 101 W/cm² intensity (ultra high power laser focus). (ii) For a 780 nm wavelength laser focused to 101 W/cm² intensity, what is the photon density (how many photons/s-cm² are passing through the focus)? (a) Laser intensities are quoted in units of W/cm², and electric fields are quoted in units of V/cm. (i) Give the numerical value of the electric field in a laser focus of 100 W/cm² intensity (a relatively low power laser focused gently), in a focus of 101 W/cm² intensity (ultra high power laser focus). (ii) For a 780 nm wavelength laser focused to 101 W/cm² intensity, what is the photon density (how many photons/s-cm² are passing through the focus)?