(II) Laser light can be focused (at best) to a spot with a radius r equal to its wavelength λ. Suppose that a 1.0-W beam of green laser light (λ=5 ×10^-7  m) is used to form such a spot and that a cylindrical particle of about that size (let the radius and height equal r ) is illuminated by the laser as shown in Fig. 31-23 . Estimate the acceleration of the particle, if its density equals that of water and it absorbs the radiation. [This order-of-magnitude calculation convinced researchers of th
(II) Laser light can be focused (at best) to a spot with a radius r equ…
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