Which statement describes how rays behave when they travel through media during reflection and refraction

The correct answer  for above statement is:

Reflection is the difference in the path of a wave front at an interface among two distinct mechanisms so that the wave front turns into the medium from which it began. refraction is the variation in the area of a wave crossing from one medium to different or from a continuous variation in the mechanism.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia