HELP all electromagnetic waves travel through
1-air
2-tissue
3-space
4-molecules

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader