[单选题]
Light has a wavelength of 600 nm in a vacuum.o 8 toevr+;1.z4q y:+5npbrj*leo w da It passesgn bg.*emoy,q7ja -o1 into glass, which has an index of refraction of 1.50. What is the wavelength of the light in the glag y7 o q*1anegmb.,oj-ss?
A. $600 \; nm$
B. $500 \; nm$
C. $400 \; nm$
D. $300 \; nm$
