A beam of 443nm electromagnetic radiation is directed onto two slits that are 0.30mm apart, creating an interference pattern on a screen. If maxima #4 is 1.7cm from the central bright spot, how far are the slits from the screen?

what are the options.

explanation:

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

k2s for potassium sulphide

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.