[单选题]
When a beam of light (wa 8+he f e3,da2lxmclh(v ixiz8 q7k v1f)y1l0nvelength = 590 nm), originally traveling in air, enters a piece of glass (index of r8fiv)71q iknvx 0l1zyefraction 1.50), its wavelength
A. increases by a factor of 1.50.
B. is reduced to 2/3 its original value.
C. is unaffected.
D. none of the given answers
