Afilm of oil that has an index of refraction of 1.45 rests on an optically flat piece of glass of index of refraction n = 1.60. when illuminated with white light at normal incidence, light of wavelengths 642 nm and 428 nm is predominant in the reflected light.

determine the thickness of the oil film.

442.75862 nm

Explanation:

m = Order

n = Refractive index

= Wavelength

We have the relation of thickness and wavelength given by

The consecutive spectral line is given by

So,

and

Dividing the wavelengths we get

The film thickness of oil is 442.75862 nm

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

explanation:

radiation

explanation:

heat is transmitted by radiation