Question

Which property describes an electromagnetic wave and not a mechanical wave?
A. transfers energy
B. travels in a vacuum
C. has frequency
D. requires a medium

Answer 1

Any ideas?

A mechanical wave is something like sound, and electromagnetic waves are light.

Can sound travel in a vacuum?

Answer 2

D
REquires medium

Answer 3

sound cant travel in agent0smith

Answer 4

^D is not correct

Answer 5

Which property describes an electromagnetic wave and NOT a mechanical wave?

Answer 6

A mechanical wave is something like sound, and electromagnetic waves are light.

Can sound travel in a vacuum? Can mechanical waves travel in a vacuum?

Answer 7

Can light travel in a vacuum?

Answer 8

sound cant but light can travel in vaccum!

Answer 9

@sylesh98 i'm asking the person who asked the question, not you...

Answer 10

sorry! but i thought i can be helpful by helping u about ur doubt
sorry
accept my apology

Answer 11

LOL i don't have doubts, i have a degree in physics - I know the answer to the question.

Answer 12

I was trying to help @mellissa_bae understand how to get the answer.

Answer 13

sorry But i felt D is the correct answer which can differentiate between mechanical and electromagnetic wave.

Answer 14

Read the question more carefully:

Which property describes an electromagnetic wave and not a mechanical wave?
A. transfers energy
B. travels in a vacuum
C. has frequency
D. requires a medium

EM waves do NOT require a medium - sound waves do. That's not what the question asks for - reread it.

Answer 15

Yah i agree then it may be A
transferring energy this time no doubt about it@

Answer 16

It's not A either - both EM and mechanical waves transfer energy.

There is a reason i was asking whether mechanical waves can travel in a vacuum...

Answer 17

ok then sorry iam leaving!
then answer is travels in vaccum!

Answer 18

??

Answer 19

B is correct