Answer the following:(a) How many wavelengths of λ0 = 500 nm light will span a 1-m gap in...

Answer the following:

(a) How many wavelengths of λ0 = 500 nm light will span a 1-m gap in vacuum?

(b) How many waves span the gap when a glass plate 5 cm thick (n = 1.5) is inserted in the path?

(c) Determine the OPD between the two situations.

(d) Verify that  corresponds to the difference between the solutions to (a) and (b) above.