[单选题]
What is the minimum thickness of a nonreflecting film coatio6hvf. s()noiy6 9zqq/j ,4(wk dpnlxgh 8mh27*s wuyng (n = 1.30) on a glass lens (n = 1.50) for wavele x mklwj2dnu*48g (w,sp/h7yh ngth 500 nm?
A. $250 \; nm$
B. $192 \; nm$
C. $167 \; nm$
D. $96.2 \; nm$
