Question: 9. Suppose you can buy a lens that can focus the diode laser beam to make it diffraction limited to a divergence of A/D.

9. Suppose you can buy a lens that can focus the diode

9. Suppose you can buy a lens that can focus the diode laser beam to make it diffraction limited to a divergence of A/D. How big would the lens have to be to focus the light onto a 1- mm spot on a wall 2 meters away. a. 650 um b. 1 mm C. 1.3 mm d.)2.6 mm P=E AF GE0 mm

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