PDF chapter test TRY NOW
Take a metal glass tumbler. Make sure that it is dry. Place a cell phone in it. (Remember that the cell phone must not be kept in water.) Ask your friend to give a ring on this cell phone from another cell phone. Listen to the ring carefully.
Now, surround the rim of the tumbler with your hands. Put your mouth on the opening between your hands. Indicate to your friend to give a ring again. Listen to the ring while sucking air from the tumbler. Does the sound become fainter as you suck air?
Remove the tumbler from your mouth. Does the sound become loud again?
When we try to suck air in, we notice that sound gets it did earlier. As we keep sucking the air, the sound becomes .
So, for sound to move, a medium .
Important!
This is an activity-based exercise. Do the activity and answer questions.
Register for free to see more content