Apair of narrow slits that are 1.8 mm apart is illuminated by a monochromatic coherent light source. a fringe pattern is observed on a screen 4.8 m from the slits. if there are 5.0 bright fringes/cm on the screen, what is the wavelength of the monochromatic light?

The wavelength of the monochromatic light is

Explanation:

Given that,

Distance between the slits d = 1.8 mm

Distance of fringe from the slits D =4.8 m

Number of fringe m =1

Distance between the fringes = 1 cm

We need to calculate the wavelength of monochromatic light

Using formula of young's double slits

Where, d = Distance between the slits

D = Distance of fringe from the slits

m = Number of fringe

y = Distance between the fringes

Put the value in to the formula

Hence, The wavelength of the monochromatic light is

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.