A Monochromatic Source Produces Light at a Wavelength of 510 $2.27 \times 10 ^ { 8 }$

Multiple Choice

A monochromatic source produces light at a wavelength of 510 nm in air. The wave then passes through water that has an index of refraction of 1.32. The velocity of propagation of the wave in the water is

A) $2.27 \times 10 ^ { 8 }$ m/s.
B) $3.96 \times 10 ^ { 8 }$ m/s.
C) $2.96 \times 10 ^ { 8 }$ m/s.
D) $$3.00 \times 10 ^ { 8 }$$ m/s.