A student performed an experiment as shown in the figure.

What happened when air was pumped out of the jar and the electric bell rang ?

Options

A. The sound became louder.
B. The sound became fainter first and then louder once all the air was pumped out.
C. The sound could not be heard anymore.
D. The sound was the same as before.

Answer

C

Explanation

The sound could not be heard because he has created a vacuum inside the jar and the sound cannot travel through vacuum.