Mechanical Wave

Q.

Mechanical waves do not require a medium to travel.

1. True

2. False

Q. Sound is not a mechanical wave.

1. False
2. True

Q.

A big explosion on the Moon cannot be heard on the Earth. Which of the following statement is the correct explanation for this?

1. The explosion produces high frequency sound waves which are inaudible

2. Sound waves require a material medium for propagation

3. Sound wave are absorbed in the moon’s atmosphere

4. Sound waves are absorbed in the earth’s atmosphere

Q.

Sound does not travel through ______.

1. Water

2. Air

3. Vacuum

4. Solids

Q.

Which among the following requires a medium for propagation?

1. Light

2. Sound

3. Microwaves

4. X rays