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?

wavelength = 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 =    ....................1

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

so put here value and we get

=    

= 437.27 × m

wavelength = 437.27 nm

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )