A laser can suspend a small glass sphere in Earth's gravitational field, g = 9.80 m/s2. Assume that the suspended sphere is made of perfectly absorbing black glass. The sphere has a radius of 0.560 mm and a density of 0.190 g/cm3. Determine the radiation intensity needed to keep the small glass sphere suspended. (answer in kW / cm^2)
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A laser can suspend a small glass sphere in Earth's gravitational field, g = 9.80 m/s2. Assume that the suspended sphere is made of perfectly absorbing black glass. The sphere has a radius of 0.560 mm and a density of 0.190 g/cm3. Determine the radiation intensity needed to keep the small glass sphere suspended. (answer in kW / cm^2)
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