Light with wavelength of 500 nm is involved in a single slit diffraction experim

Question

Light with wavelength of 500 nm is involved in a single slit diffraction experiment with a slit width of 0.03 mm. A screen that is placed 2 m away from the slit displays the diffraction pattern.

1) What is the width of the central bright fringe? a) 2.7 cm b) 3.7 cm c) 4.7 cm d) 5.7 cm e) 6.7 cm

2) At what angle above the central bright fringe is the 3rd dark fringe located? a) 1.9 degrees b) 2.9 degrees c) 3.9 degrees d) 4.9 degrees e) 5.9 degrees

3) How many dark fringes can be seen on the screen? a) 40 b) 80 c) 120 d) 160 e) 200

4) What would happen to the pattern if the slit width were decreased? a) the fringes would get closer together b) the fringes would spread farther apart c) nothing

Explanation / Answer

1. (a) 2.7

2. (c) 3.9 degrees

3. (c) 120

4. b) the fringes would spread farther apart

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