Very short pulses of high-intensity laserbeams are used to repair detached portions of the retina of the eye. Thebrief pulses of energy absorbed by the retina weld the detached portionsback into place. In one such procedure, a laser beam has a wavelengthof 810 nm and delivers 250 mW of power spread over a circularspot 510 mm in diameter. The vitreous humor (the transparent fluid thatfills most of the eye) has an index of refraction of 1.34. What average pressure would the pulse of the laser beam exert at normal incidence on a surface in air if the beam is fully absorbed?
Very short pulses of high-intensity laserbeams are used to repair detached portions of the retina of the eye. Thebrief pulses of energy absorbed by the retina weld the detached portionsback into place. In one such procedure, a laser beam has a wavelengthof 810 nm and delivers 250 mW of power spread over a circularspot 510 mm in diameter. The vitreous humor (the transparent fluid thatfills most of the eye) has an index of refraction of 1.34. What average pressure would the pulse of the laser beam exert at normal incidence on a surface in air if the beam is fully absorbed?
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Very short pulses of high-intensity laser
beams are used to repair detached portions of the retina of the eye. The
brief pulses of energy absorbed by the retina weld the detached portions
back into place. In one such procedure, a laser beam has a wavelength
of 810 nm and delivers 250 mW of power spread over a circular
spot 510 mm in diameter. The vitreous humor (the transparent fluid that
fills most of the eye) has an index of refraction of 1.34. What average pressure would the pulse of the laser
beam exert at normal incidence on a surface in air if the beam is fully
absorbed?
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