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If a blue filter is placed over a light source aperture so that the incident rays are blue and these rays pass through a red filter, what color should the reflected rays be? Based on these observations, what makes the red filter appear red?
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An oil film (n = 1.48) floating on water (n = 1.33) is illuminated by white light at normal incidence. The film is 274 nm thick. The reflected light will be predominately a single color. Find the wavelength of the domina ...
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