As an admirer of thomas young, you perform a double-slit experiment in his honor. you set your slits 1.19 mm apart and position your screen 3.53 m from the slits. while young had to struggle to achieve a monochromatic light beam of sufficient intensity, you simply turn on a laser with a wavelength of 635 nm. how far on the screen are the first bright fringe and the second dark fringe from the central bright fringe? express your answers in millimeters.

First bright fringe is at 1.82 mm

First dark fringe is at 2.83 mm

Solution:

As per the question:

Slit width, d = 1.19 mm =

Distance from the screen, x = 3.53 m

Wavelength of the light,

Now,

We know that the 1st bright fringe from the central fringe is given by:

where

n = 1

Also, we know that the 1st dark fringe from the central fringe is given by:

the answer for apex is the lowest

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.