Question

ill give brainliest pls help!

How are electromagnetic waves different from mechanical waves?

Select one:
a. Electromagnetic waves are all high frequency; mechanical waves are all low frequency.
b. Electromagnetic waves can travel through a vacuum; mechanical waves require a medium.
c. Electromagnetic waves are visible; mechanical waves are invisible.
d. Electromagnetic waves always reflect; mechanical waves always refract.

Answer 1

Answer:A is the correct answer..hope this helps

Explanation:Mechanical waves and electromagnetic waves are two important ways that energy is ... Matter that waves are traveling through is called a medium. ... The unit of frequency of a radio wave  one cycle per second

Answer 2

Answer:

c

Explanation:

i just took the quiz