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Assignment 10: Diffraction
Concepts:
diffraction
singleslit diffraction
circular diffraction patterns
Rayleigh’s criterion
multipleslit diffraction
diffraction gratings
xray diffraction
Reading in text:
Chapter 36: Sections 13, 5a, 68, 10.
Assignment:
Quiz may be given on Tuesday April 14 or Wednesday April 15.
Due in
lecture on Monday April 13.
1. Monochromatic light of wavelength 440 nm is normally incident on a narrow slit.
On a
screen 2.00 m away, the distance between the second diffraction minimum and the central
maximum is 1.8 cm.
(a) Calculate the angle of diffraction of the second minimum.
(b) Find the width of the slit.
2.
(a) How would the pattern observed in problem 1 differ if a red laser (
λ
=
660 nm
) were used
instead?
(b) What would happen if the width of the slit were now doubled?
3. In this problem you will make a rough
estimate of the angular resolving power of the human
eye as limited by diffraction for the finite aperture of the entrance pupil in front of the lens.
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 Spring '08
 AMADEURI
 Diffraction, Cornell University, diffraction singleslit diffraction, diffraction circular diffraction

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