p36_021 - at the slits diFer by 2 πx m − 2 πx = 2...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
21. Consider the two waves, one from each slit, that produce the seventh bright fringe in the absence of the mica. They are in phase at the slits and travel diFerent distances to the seventh bright fringe, where they have a phase diFerence of 2 πm =14 π . Now a piece of mica with thickness x is placed in front of one of the slits, and an additional phase diFerence between the waves develops. Speci±cally, their phases
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: at the slits diFer by 2 πx λ m − 2 πx λ = 2 πx λ ( n − 1) where λ m is the wavelength in the mica and n is the index of refraction of the mica. The relationship λ m = λ/n is used to substitute for λ m . Since the waves are now in phase at the screen, 2 πx λ ( n − 1) = 14 π or x = 7 λ n − 1 = 7(550 × 10 − 9 m) 1 . 58 − 1 = 6 . 64 × 10 − 6 m ....
View Full Document

This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

Ask a homework question - tutors are online