Yes, using a vacuum cleaner can blow out the flame of a candle. When the vacuum cleaner is turned on, it creates a flow of air, which results in increased air pressure around the vacuum's nozzle. This increase in air pressure can cause the air around the candle's flame to move rapidly, leading to the flame being extinguished.
The flame of a candle requires a steady supply of oxygen to burn. When you bring a vacuum cleaner close to the candle, the increased air pressure disrupts the flow of oxygen around the flame. The fast-moving air from the vacuum effectively blows away the oxygen, starving the flame of the necessary element for combustion.
Additionally, the flow of air from the vacuum can cause the flame to flicker and become unstable. If the flame becomes too weak due to the lack of oxygen, it will eventually extinguish.
It's essential to exercise caution when using a vacuum cleaner near open flames to avoid accidents or injury. Always ensure that candles and other open flames are safely extinguished before cleaning nearby areas with a vacuum cleaner.