Distance between the third bright band

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1)Monochromatic light with a frequency of 5.50x101432) Hz is directed through a diffraction grating ruled with 6.00x10 lines/m. What is the distance between the third bright band and the fifth dark band of the interference pattern formed on a screen 2.50 m from the grating?

Blue light with a wavelength of 425 nm passes from a vacuum into a glass lens, and the index of refraction is found to be 1.65. The glass lens is replaced with a plastic lens. The index of refraction for the plastic lens is 1.54. In which one of the two lenses does the light have the greatest speed and what is that speed?

Reference no: EM132762702

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