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A photon has a wavelength of 293 nm. Calculate the energy of the photon in joules. Enter your answer in scientific notation.? The ratio of corres ponding sides of similar triangles is 14:15 what is the ratio of the perimeters? -6(-86+7)=-90? Balance the following equation: 7 over 3 next to Li + - → 4 over 2 next to He + 4 over 2 next to He? Since UV rays only span to exist to 420nm and UV rays damage cell tissue, do wavelengths greater have the same damaging effects?