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crosbykins
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Homework Statement
A piece of paper of thickness 15 * 10^-6 m is used to create an air wedge between 2 glass slides that are 7.25 cm long. If the wavelength of the light being used is 595 nm, how many interference fringes are counted across the entire pattern?
Homework Equations
delta x = L ( wavelength/2t)
The Attempt at a Solution
delta x = (.0725)[(595 * 10^-9)/(2)(15 * 10^-6)]
= 1.44*10^-3 m
*now i know the distance between the dark fringes so i can divide the length of the glass slides to find the number of fringes:
.0725/1.44*10^-3
= 50 fringes
***is this correct?*** if it's wrong, a step-by-step solution would be greatly appreciated