Microwaves and X-rays are both part of the electromagnetic spectrum, which allows them to travel through a vacuum. Red light is an example of an electromagnetic wave, distinct from mechanical waves that require a medium.
Microwaves and X-rays have in common that they are both part of the electromagnetic spectrum. They are not mechanical waves like sound or ocean waves; they can travel through a vacuum and do not require a medium to propagate. This is because electromagnetic waves are associated with oscillations in electric and magnetic fields. Therefore, the correct answer to what microwaves and X-rays have in common is C) They are part of the electromagnetic spectrum.
Among the options given, the example of an electromagnetic wave is A) Red light. Unlike mechanical waves, which include sound waves, ocean waves, and seismic waves, electromagnetic waves like red light, microwaves, and X-rays do not require a medium and can travel through the vacuum of space at the speed of light.
In summary, microwaves and X-rays are similar in that they are both electromagnetic waves which allows them to propagate through space without a medium, unlike mechanical waves which require one.