caption: Glass bottles make a lovely sound when you tap them gently with a metal or wooden stick. You can change the note by putting different amounts of water inside the bottle.
exif: {"Image DocumentName": "Glass bottles make a lovely sound when you tap them gently with a metal or wooden stick. You can change the note by putting different amounts of water inside the bottle.", "Image ImageDescription": "The water changes the size of the column of air inside the bottle. An empty bottle has a long column of air to vibrate which gives a low note. The bottle shown by the arrow has a lot of water inside. Because of this, it has only a short column of air inside, so this bottle will give a high note.", "Image XResolution": "200", "Image YResolution": "200", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}