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Is there really that much
dust around?
Some people find it
difficult to believe that there is enough to cause so
many orbs. Other think there is too much dust
around to produce single orbs (most about this later).
What is dust?
According to Wikipedia, dust
is "a general name for minute solid particles with
diameters less than 500 micrometers".
What causes dust?
In homes and work places
most dust comes from skins cells from humans and pets
that 'slough off'.
How does dust become
airborne?
Dust usually becomes
airborne by people moving around and by cleaning, thus
disturbing the dust particles, as well as heat from
convection, drafts, etc. It can take dust a
long time to settle after it has become stirred up.
In fact, dust is airborne most of the time, only really
settling in (say) houses which no-one inhabits.
Try it at home!
You can see for yourself
much dust is in the air at any one time. The best
time to see dust is when it's dark and when you got a
powerful light source.
If you take a photo in a
dark room - but hold the camera side on - you will be
able to see all the particles of dust illuminated by the
flash. You can also try this with many bright
light sources, e.g. torch or projector.
Next Questions:
- What is the Orb Zone?
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