Question 5 of 10 One tool scientists use to learn about the weather is radar.
To use radar, a weather tower sends out radio waves and
then detects the waves that are reflected back to the
tower.
If a great number of radio waves are reflected back from a particular area,
what does that tell scientists about the weather in that area?
A. There is a light sprinkling of rain in the area.
OB. There is going to be a drop in air pressure in the area.
OC. There is a large amount of rain or snow in the area.
OD. There is only sunshine in the area, with no clouds
PREVIOUS

if they have a finite resultant

area of focus

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