You sit on a pier and look straight down into the pond below. The apparent depth of the pond from the surface of the water is 5.0 meters. Given that the refractive indexes of air and water are 1.0 and 1.3, respectively, what is the real depth of the pond in meters?

W) 0.3

X) 3.8

Y) 5.0

Z) 6.7
Z) 6.7