Stony Brook University EXAM FOR MEC-105-REVIEWED BY EXPERTS-ALL ANSWERS CORRECT!!

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MEC 105 Exam 3 1. Why is light from a low-pressure sodium vapor lamp unpleasant? A) It has an ugly mix of colors. B) It is monochromatic. C) It has too much blue. D) It has too much red. 2. Ultr... aviolet light causes chemical damage to your skin while infrared light does not because A) ultraviolet light as a longer wavelength than infrared light. B) ultraviolet light has more photons than infrared light. C) a photon of ultraviolet light carries much more energy than a photon of infrared light. D) ultraviolet light is more intense than infrared light. 3. When an x-ray photon is absorbed in a tumor, it may cause the tumor cell to die because the photon A) causes the cell to crystallize into a brittle solid that cannot tolerate any deformation. B) carries enough energy to damage molecules and cause chemical injury to the cell. C) magnetizes the cell and causes it to stick to passing killer cells of the immune system D) polarizes the cell and causes its vertical electric field to become horizontal 4. The tubes in fluorescent lamps have a white powder on their inner surfaces. This powder A) slows down the white light produced by the gas atoms inside the tube so that less of that white light reflects as it passes through the walls of the tube. B) conducts electricity from one electrode to the other and emits white light as current passes through it. C) absorbs ultraviolet light and uses the energy from that light to produce white light. D) scatters the white light produced by the gas atoms inside the tube so that it is both vertically and horizontally polarized and doesn’t cause glare [Show More]

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