Suppose two flat glass plates 30-cm long by a piece of paper of unknown thickness by green light, λ = 546 nm, 200 fringes deiate are in contact along a at the other end. if the plates are illuminated one end and separated are observed. find the thickness of the piece of paper.

Answer the above statement is ( false );

Make them both to where they have the denominator of 18that makes 3/2 equal 27/18 and 1/9 equal 2/18so now you have  27/18x+5=2/18subtract 5 from the other sideso now you have 27/18x+2/18-5then subtract 2/18 from 27/18 to get 25/18x=-5then divide 25/18 by -5 and your answer will be  -5/18

Ithink it’s b hope it