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The red light from a helium-neon laser has a wavelength of 721.4 nm in air. Find the speed, wavelength, and frequency of helium-neon laser light in air, water, and glass. (The glass has an index of refraction equal to 1.50.)
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What type of electromagnetic wave is used in security pens? a. x-rays c. microwaves b. visible light d. ultraviolet radiation select the best answer from the choices provided
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Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?
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The red light from a helium-neon laser has a wavelength of 721.4 nm in air. Find the speed, waveleng...
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