This charge of static electricity makes the filter more effective in capturing smoke particles and bacteria.

Smoke detectors work by sensing smoke particles, not heat or flames.

A measurement is made of the light received which will be lower as the concentration of smoke particles becomes higher.

The more smoke particles are present between the two, the less light will be measured.

Our first experiments suggested that fires in low gravity could actually have more time for development of smoke particles.

The drifting smoke particles in the image provides some insight into low pressure gas behavior.

It also really shows the light that is in fact always there; you just see it explicitly through the smoke particles.

The force that has pushed the smoke particles away from the rod is an example of a thermophoretic force.

But by that time the smoke particles have been diluted or dispersed enough to no longer be visible.

Specifically, our weather control algorithm assumes that both the carbon dioxide levels and the concentration of smoke particles are less than a given magnitude.