Investigators measure the size of fog droplets using the diffraction of light. A camera records the...
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Investigators measure the size of fog droplets using the diffraction of light. A camera records the diffraction pattern on a screen as the droplets pass in front of a laser, and a measurement of the size of the central maximum gives the droplet size. In one test, a 690 nm laser creates a pattern on a screen 30 cm from the droplets. |
Part A If the central maximum of the pattern is 0.32 cm in diameter, how large is the droplet? |
Homework Answers
Solution,
Diameter of bright central maxima,
= 2 x 1.22 x lambda x D/d = 2.44 lambda x D/d
0.32 = 2.44 x 690 x 10^-7 x 30/d
Solving for diameter 'd'
d = 0.0158 cm
Comment in case any doubt please rate my answer....
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