The
is the time it takes for a wave to complete one cycle.

Period

Explanation:

The period of a wave by definition "is the time it takes to complete one cycle"

We can see the concept of period on the figure attached.

Is the time required to go from at some reference level to the same level or complete one complete cycle. And is defined as:

Where f is the frequency. And is also defined as:

Where is the wavelength for the wave and v the velocity.

good looking response

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