what are newton rings????????????????????

plz xplain

Step one: use a search engine.

 

Step two: there is no step two.

Or just use wikipedia (hyperphysics is also probably a good bet)

 

http://en.wikipedia.org/wiki/Newton_rings

 

They're not something I've ever really come accross though, so no more than that...

what are newton rings????????????????????

plz xplain

They are interference bands that are seen when a large plano-convex lense

(That is one side flat, the other spherical with a large radius) is placed on a

flat glass plate, and a light of definite wave length is shone directly onto it. Destructive interference at every thickness of air space equal to

(n+1/2)lambda produces dark rings. This is described in many physics texts, which still are available off line.