What is the correct interpretation of this diagram? A. Up and down forces are balanced. The force toward the right is greater than the force toward the left. The object will move toward the right.

B. Up and down forces are balanced. The force toward the right is greater than the force toward the left. The object will move toward the left.

C. Up and down forces are balanced. The object does not move.

D. Forces from the left and the right are unbalanced. The object moves left.

C

Explanation:

because when they are balanced they won't go anywhere only stay in the same spot

C: up and down forces are balanced the object does not move

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.