A dentist's lamp has a visible light luminosity of 1.1 joules per second. If the lamp is moved to a distance of X meters away from a patient's teeth, what is the flux of the lamp on the teeth? Then, making a reasonable estimate of the surface areas involved, how much energy shine from the lamp onto a single tooth over a time period of Y seconds?

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Sol Given tuminosity X 1188 4 192 Flux flux Po... View the full answer