[单选题]
Light of wavelength 500 nm illul8rg4 (zb4gq p/btb8b minates a soap film ( n = 1.33). What is the msxb9v 3 -uhewycpc43)inimum thickness of film that will give an interference when the light is incident normallxw)v c4 93cb3suhpey -y on it?
A. $24 \; nm$
B. $94 \; nm$
C. $188 \; nm$
D. $376 \; nm$
