Pb. 5 Find the intensity and depth of focus for an Ar laser beam with a power of 1W and divergence of 0.5mrad if the beam is collimated by a convex lend of a focal length of 5cm?

1.6

Bohr's postulates for the motion of the electron in a hydrogen atom leadto the conclusion thata) the energy of the electron is quantized.b) any radiation emitted by hydrogen should form a continuous spectrum.c) any radiation emitted by hydrogen should be in the form of discretewavelengths.d) all of the abovee) a and b onlyf) a and c onl