What do you call a wave that is made up of electric and magnetic fields?

wave made of particles
electromagnetic wave
electronic wave
magnetic wave

electromagnetic wave

Explanation:

Waves can be classified into two types:

- Mechanical waves: these waves are produced by the oscillations of the particles in a medium, which can vibrate parallel or perpendicular to the direction of propagation of the wave (in the first case, we call them longitudinal waves, while in the second case, we call them transverse waves). These waves always need a medium to propagate, since they are transmitted through the vibrations of the particles in the medium.

- Electromagnetic waves: these waves are produced by the oscillations of electric and magnetic fields, which oscillate in a direction perpendicular to the direction of motion of the wave (therefore, they are transverse waves). Electromagnetic waves do not transmit through the vibration of particles, therefore they do not need a medium to propagate, and so they can also travel in a vacuum (like in space).

Based on these definitions, the correct answer is

Electromagnetic waves

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray