問題詳情
11. We wish to coat flat glass (n=1.5) with a transparent material (n=1.25) so that reflection of light atwavelength 600 nm is eliminated by interference. What minimum thickness can the coating have todo this?
(A) 30 nm
(B) 100 nm
(C) 120 nm
(D) 400 nm
(E) 480 nm
參考答案