Question: Hi I'm having trouble with this Physics homework question could someone please help me? 1. a) Light of wavelength 551 nm passes through two slits

Hi I'm having trouble with this Physics homework question could someone please help me?

1. a) Light of wavelength 551 nm passes through two slits separated by 0.150 mm and is observed on a screen 1.10 m behind the slits. The location of the central maximum is marked on the screen and labeled y = 0.00. At what distance, on either side of y = 0.00, are the m = 5 bright fringes?

b) A very thick piece of glass is then placed in one slit. Because light travels slower in glass than in air, the wave passing through the glass is delayed by 3.00 10-16 s in comparison to the wave going through the other slit. What fraction of the period of the light wave is this delay?

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