While it might be socially acceptable for food lovers to discuss the care of the finest wines, or the best way to brew gourmet coffee, what if your favorite beverage happens to be soda pop? Chances are, a gourmet wouldn’t have a lot to say about this topic. Learn more on this Moment of Science.
When the bottle vibrates, the water inside has to vibrate with it. Having to move all that water slows down the vibrations of the glass and that in turn slows down the frequency of the sound waves, producing a lower pitch. Adding more water slows down the bottle’s vibrations even more, creating an even lower pitch.