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disa [49]
3 years ago
14

You find an unmarked blue laser on your way to physics class. When you get to class you realize you can determine the wavelength

of the laser by doing a double slit experiment. Shining the laser through a double slit with a slit separation of 0.325 mm on the wall 2.20 m away the first bright fringe is 2.96 mm from the center of the pattern. What is the wavelength?
Physics
1 answer:
Ray Of Light [21]3 years ago
4 0

Answer:

wavelength \lambda = 437.27 nm

Explanation:

given data

first bright fringe = 2.96 mm

slit separation = 0.325 mm

distance D = 2.20 m

solution

we know that this is double slit experiment

so we apply here Fringe width formula that is

β = \frac{D\lambda}{d}    ....................1

\lambda is Wavelength of light and  D is Distance between screen and slit and d is slit width

so put here value and we get

\lambda = \frac{2.96*0.325*10^{-6}}{2.20}    

\lambda = 437.27 × 10^{-9} m

wavelength \lambda = 437.27 nm

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