Physics Demo Number: 197
Approximate
Run Time: 10min
Candle Free Fall
Demo Description
Use a dedicated plastic and rubber candle holder.While standing on top of lecture table ,light the candle and drop the apparatus.
Observe the flame extinguishing under free fall conditions.
Scientific Principles
Vertical hydrostatic pressure variation in the air surrounding a candle is necessary for continuous burning.This pressure variation disappears under free fall conditions in the container.
Equipment
Equipment Location
[H-4-5]Instructions
The
photo shows the plastic and rubber air shield surrounding the candle.
This shield prevents air currents from blowing the flame out.
The second photo shows the right end view of the apparatus and the corkable hole for getting a light to the candle.
The third photo shows the left end of the apparatus, which is designed to be towards the floor when one releases the apparatus for windless free fall.