Lab Test #7, Diffraction
Lab T/A Elton Freeman
1. A beam of monochromatic light with a wavelength of 500 nm is directed through
an absorber having 5 equally narrow slits separated by 20 μm between adjacent
slits. The resulting diffraction pattern is observed on a screen that is
perpendicular to the direction of light and 5 m from the slits. The intensity of the
central maximum is 1.3 W/m2.
(a) What are the distances from the central maximum to the first and second
principal maxima on the screen?
(b) What will be the intensity of the central maximum if there are only 4 equally
narrow slits (of the same width as in part a), separated by 20 μm between adjacent
slits?
2. Do problem number 1 on page 358
3. Do problem number 3 on page 358
4. Do problem number 5 on page 358
5. Do problem number 4 on page 358
6. Do problem number 6 on page 359
