science
Grade-4-
Easy
Question
In which of the following media can non-mechanical waves travel?
- In a vacuum and a medium
- In a vacuum, but not in a medium
- In a medium, but not in a vacuum
- Neither in a medium nor a vacuum
Hint:
Travel both in matter or space.
The correct answer is: In a vacuum and a medium
- Non-mechanical waves can travel both in vacuum and in any medium.
- Mechanical waves always need a medium for propagation.
- Therefore, the correct option is a.
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