(no subject)
Q: Why is the sky blue?
A: Of course for an oscolating electric dipole, the radiated energy is proportional to the square of the charge acceleration, and since the polarization of air is directly proportional to the applied electric field, then the charge acceleration density is proportional to the second time derivative of the electric field, which is obviously proportional to the square of the frequency for an incident EM wave of a given energy density. Thus the dispersed energy is proportional to the forth power of the frequency and EM waves in the 375nm range are scatter by the atmosphere 16 times as much as EM waves in the 750nm range.
A: Of course for an oscolating electric dipole, the radiated energy is proportional to the square of the charge acceleration, and since the polarization of air is directly proportional to the applied electric field, then the charge acceleration density is proportional to the second time derivative of the electric field, which is obviously proportional to the square of the frequency for an incident EM wave of a given energy density. Thus the dispersed energy is proportional to the forth power of the frequency and EM waves in the 375nm range are scatter by the atmosphere 16 times as much as EM waves in the 750nm range.