Traditional Culture Encyclopedia - Photography major - What gas is in the hot air balloon?

What gas is in the hot air balloon?

Inside the balloon is (hot air or some gas, such as hydrogen or helium)

Hot air balloon: The density of heated air or some gases, such as hydrogen or helium, is lower than that of the air outside the balloon to generate buoyancy flight. Hot air balloon mainly adjusts the temperature of the air in the balloon through its own heater, so as to control the balloon's rise and fall. 1783165438+1October 2 1 day, Montgomery brothers completed the first hot air balloon trip of mankind. 199 1 year1October 2 1 day, human beings realized the first hot air balloon floating over Mount Everest. 1On March 20th, 999, man traveled around the world in a hot air balloon for the first time. Hot air balloons first appeared, and now flying in hot air balloons has become a favorite air sports. In addition, hot air balloons are often used for aerial photography and air travel.