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Blue light (λ = 450 nm) shines on a diffraction grating that has 4000 lines/inch.
A. Calculate the angle of the fourth-order image.
B. For this grating and light source, can you have a 15th order image?
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When yellow light from a sodium lamp shines on a certain photocell, What potential would be needed to stop the electrons if light with 4000 A is used
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Estimate the distance of GPS satellite from the ground.
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