2. Identify Give the region of the EM spectrum for each EM wave described. Region of EM spectrum
Description
Used by police officers to detect
the speed of cars by radar
Energy from the sun that can
cause sunburn
Used in a device that takes images
of bones
Carry television signals to your
home
Can produce rainbows when there
are water droplets in the sky

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?