A helium-neon laser of the type often found in physics laboratories has a beam power of 4.00 mW at a wavelength of 633 nm. The beam is focused by a lens to a circular spot whose effective diameter may be taken to be equal to 2.00 wavelengths. Calculate the intensity of the focused beam. Calculate the radiation pressure exerted on a tiny perfectly absorbing sphere whose diameter is that of the focal spot. Calculate the force exerted on this sphere. Calculate the magnitude of the acceleration imparted to it. Assume a sphere density of 5.70×103 kg/m3