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Laser light of wavelength 660nm is used to weld a retina detachment. If the pulse has width 60 ms and power 0.5 KW the approximate number of photons in the pulse are? |
| Answer» Laser light of wavelength 660nm is used to weld a retina detachment. If the pulse has width 60 ms and power 0.5 KW the approximate number of photons in the pulse are? | |