College Physics Quiz
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WAVES, SOUND, AND PHYSICAL OPTICS
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Newton's rings are formed between a convex lens and a flat glass plate. The setup is illuminated with sodium light (λ=589\lambda = 589 nm) and the radius of the 5th bright ring is measured to be 2.22.2 mm. If the same setup is then illuminated with blue light (λ=450\lambda = 450 nm), what will be the radius of the 7th bright ring, and how does this compare to the 7th ring with sodium light?
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