Equal Expression

Equal Expressions

Question : change in theta d = (0.14 lamda/0.55 micro m)(1m/D)

change in theta s = (0.7)(0.55 micro m / lamda)^1/5

Find the expression in terms of D for lamda at which these two expressions are equal.

Answer is: lamda = (0.55 micro m)(5D / 1m)^5/6

I'm trying to teach myself how to get to the third expression from the
first two expressions. Could you show me the steps? Thanks so much!