Why do we always have crystal ball covered? - JavaLab

Why do we always have crystal ball covered?




Why do we always have crystal ball covered?

While surfing the web, I came across a fascinating article on Twitter.

Why do you always have crystal ball covered?

It sounds like a fun topic, so we decided to simulate the refraction of all light entering a crystal ball.
As a result of the simulation, it was found that a focus was formed slightly behind the marble.
If there is a flammable material in the focus area, a fire may occur. (Crystal looks cold, but it’s actually fire-attribute…)

And, it actually happened

  • On March 8, 2021, a fire broke out in a house in Wisconsin, USA. ( Related articles )
  • On February 22, 2014, a fire broke out in a house in London, England. ( Related articles )