Consider red light with a wavelength of 692 nm in air that is incident onto two slits such that it gives diffraction fringes that are 1.00 mm apart on a screen at a distance l from the slits. if the screen is moved back by an additional 4.00 cm, the fringes become 1.20 mm apart. what is the separation between the slits?

The separation between slits is:

Explanation:

The distance between adjacent maxima is given by the following expression:

For the distance between maxima being 1mm (let's solve all this problem using milimeters) we have the following:

(1)

For the second condition in which the screen is moved 40 mm away we have the following:

(2)

Using equation 1 we can write:

Plugging the value of L in equation 2 brings us to

We could also as a bonus find L which is just

I'll leave that up to you! Good luck!

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -