Question

An interference pattern is produced by light with a wavelength 550 nm from a distant source incident on two identical parallel slits separated by a distance (between centers) of 0.580 mm .

a) If the slits are very narrow, what would be the angular position of the first-order, two-slit, interference maxima? (Solve for theta, in radians)

b) What would be the angular position of the second-order, two-slit, interference maxima in this case? (Solve for theta, in radians)

c) Let the slits have a width 0.310 mm . In terms of the
intensity *I*0 at the center of the central maximum, what is
the intensity at the angular position of *θ*1?

d) What is the intensity at the angular position of
*θ*2?

Answer #1

a)

From

For m=1

in radians

b)

For m=2

in radians

c)

From

where

For m=1

in degrees

Therefore

d)

For m=2

in degrees

Therefore

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