em waves

microwave oven

Electromagnetic waves are transverse waves that have a magnetic and electric field. The cell phones won’t get any calls because the metal inside won’t allow the electromagnetic waves out or magnetic waves in.

sunglasses

Sunglasses are polarized vertically. Light is unpolarized and an electromagnetic wave that consists of alternative electric magnetic fields. Light that reflects off the ocean as a glare becomes horizontally polarized. Laying down will change the polarity of the glasses so they are horizontally polarized.

compare electromagnetic and mechanical waves..

Electromagnetic waves don’t need matter to move. Electromagnetic waves are transverse. Mechanical waves require a medium.

vibgyor,.. infrared vs visible

Infrared rays and visible rays are electromagnetic so they travel at the same speed. Infrared rays however have a lower frequency and energy and humans can’t see them