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The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?
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The receptor cells that convert light energy into neural signals are called
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First to answer will be the brainliest i need the answer asap
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Light waves from the sun can be converted to electricity through...
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