Photon and Light Intensity Exercise(1) A laser emits 2.68 x 106 photons per second in a thin circular beam with diameter 1.0 mm. Thewavelength of the photons is 532 nm.(a) What color will the laser beam appear to be to the average person? (answer: greenish)(b) What is the laser output power? (answer: 10 mW)(c) What is the intensity of the beam in W/m2? (answer: 1.3 x 104 W/m?)(b) What is the intensity of the beam on a person's retina if the lens of the eye focuses the beam to acircular spot with a 0.1 mm diameter onto the retina? (answer: 1.3 x 106 W/m2)

Given: Wavelength,λ=532nm=532×10-9nmPlanck's constant,h=6.626×10-34JsSpeed of…

Answered: (1) A laser emits 2.68 x 1016 photons…

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