Two beams of light start together and then hit a slab of two different kinds of material. This will cause one of the beams to get "ahead" of the other, that is, one will emerge from the slab sooner than the other. The beams have a wavelength of 670 nm outside the slabs, and the slab is d = 1.5μm thick. If the top half of the slab has index of refraction 1.71 and the bottom has index 1.42, by what time interval will one of the beams be ahead of the other once they've gone through the slab? P n 2 d
Two beams of light start together and then hit a slab of two different kinds of material. This will cause one of the beams to get "ahead" of the other, that is, one will emerge from the slab sooner than the other. The beams have a wavelength of 670 nm outside the slabs, and the slab is d = 1.5μm thick. If the top half of the slab has index of refraction 1.71 and the bottom has index 1.42, by what time interval will one of the beams be ahead of the other once they've gone through the slab? P n 2 d
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Transcribed Image Text:Two Slabs
Two beams of light start together and then hit a slab of two different kinds of material. This will cause one of the beams to get "ahead" of the other, that is, one will emerge from the slab sooner than the other. The beams have a
wavelength of 670 nm outside the slabs, and the slab is d = 1.5μm thick. If the top half of the slab has index of refraction 1.71 and the bottom has index 1.42, by what time interval will one of the beams be ahead of the other once
they've gone through the slab?
2
d
time=
Note: People actually do use this kind of technique to very accurately control the relative positions of light pulses in devices and experiments.
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