[单选题]
Light has wavelength 600 nm in a vacuum. It passes into glaalq81ck g/ cu7ss, :yso3g69 yyoz which has an index of refraction of 1.50. What is the frequency of the light insideo3yogzs y :9y6 the glass?
A. $3.3 \times 10^{14} \; Hz$
B. $5.0 \times 10^{14} \; Hz$
C. $3.3 \times 10^{5} \; Hz$
D. $5.0 \times 10^{5} \; Hz$
