Question

which sentence correctly describes electromagnetic radiation?
electromagnetic radiation is a stream of particles creating a magnetic field.
electromagnetic radiation is energy traveling in waves through a vacuum.
electromagnetic radiation is the transfer of heat between different objects.
electromagnetic radiation is a force pulling objects toward one another

Explanation:

Electromagnetic radiation is a form of energy that travels in waves. It does not require a medium (like air or water) to propagate, so it can travel through a vacuum.

• The first option is incorrect because electromagnetic radiation is not a stream of particles creating a magnetic field.
• The third option is incorrect as it describes heat transfer (which is a different concept, like conduction, convection, or thermal radiation in a different sense).
• The fourth option is incorrect as it describes a force (like gravitational force) pulling objects, which is not related to electromagnetic radiation.

Answer:

Electromagnetic radiation is energy traveling in waves through a vacuum.