You measure distances from the center of a diffraction pattern (y) to a series of dark fringes on a screen that is 0.3000 ± 0.0005 m away from the 0.04-mm wide slit you are using to create the pattern. you create a plot of y (in m) vs m and get a slope for the best-fit line of 0.005525 ± 8.175 10-6. what is the wavelength of the laser you used to collect the data?

To solve this problem it is necessary to apply the concepts related to Slit Diffraction.

The expression for separation between fringes is given by,

Where,

Wavelength

d = Separation between fringes

a = Slit width

D = Distance between the slits

Re-arrange to find , we have that

Replacing with our values we have

Therefore  the wavelength of the laser you used to collect the data is 743.14nm

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.