Find acceleration given initial velocity, time, and distance?

What happens to the light rays when they hit the specimen?

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat