How many beats per second are heard

Reference no: EM1352376

Q. A layer of transparent plastic (n = 1.63) on glass (n = 1.52) looks dark when viewed in reflected light whose wavelength is 576 nm in vacuum. Find the two smallest possible nonzero values for the thickness of the layer.

Q. When two tuning forks of 144 Hz and 165 Hz, respectively, are sounded simultaneously, how many beats per second are heard?

Reference no: EM1352376

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