Question

What is the difference between mechanical waves and electromagnetic 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

B

Step-by-step explanation:

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Answer 2

B.

Explanation: Mechanical waves need a medium to travel.