[单选题]
Light has a wavelength of 600 nm in a vacuum. It passes 8)zdo (impoj0 into glass, which hasz0ywq a2r,mnwj89np . an index of refraction of 1.50. What is the wavelength of the light inr2.8z ww y9nm0jqa p,n the glass?
A. $600 \; nm$
B. $500 \; nm$
C. $400 \; nm$
D. $300 \; nm$
