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Order of magnitude - length
10
-35
m - Lengths smaller than this do not make any physical sense. See
Planck length
10
-15
m - Size of atomic nucleus
10
-10
m - Size of atoms - See
Ångström
10
-9
m = 1 nanometer (nm) - Diameter of
DNA
helix
10
-8
m = 10 nm
20 nm -- thickness of
bacterial flagellum[?]
90 nm -- Human immunodeficiency virus (HIV)
10
-7
m = 100 nm
100 nm -- Maximum
particle
size that can fit through a
surgical mask[?]
10
-6
m = 1 micrometer aka micron (μm)
diameter of typical
bacterium
6 μm --
anthrax
spore
7 μm -- strand of
spider web[?]
10
-5
m = 10 μm
10 μm -- Width of
cotton
fibre
80 μm -- width of human
hair
10
-4
m = 100 μm
125 μm -- Dust mite
10
-3
m = 1 millimeter (mm)
2.54 mm -- distance between pins in old
DIP[?]
(dual-in-pair) electronic components
10
-2
m = 1 centimeter (cm)
1.5 cm -- length of an average
mosquito
.
2.54 cm -- 1 inch
10
-1
m = 10 cm
30 cm -- 1
foot
91 cm -- 1
yard
1 m
1.7 m -- average person's height(?)
10 m
20 m -- Length of a
cricket
pitch
52 m -- Height of
Niagara Falls
100 m
448 m -- Height of the
Empire State building
1,000 m = 1 kilometer (km)
1600 m = 1
mile
8850 m -- Height of
Mount Everest
10,000 m = 10 km
11,518 m --
Mindanao deep[?]
35 km -- Width of the
English Channel
100,000 m = 100 km
10
6
m = 1,000 km
6,400 km -- The length of the
Great Wall of China
10
7
m = 10,000 km
12,756 km = Diameter of the
earth
10
8
m = 100,000 km
384,000 km --
Moon
's orbital distance from Earth
10
9
m
1,390,000 km -- Diameter of
Sun
10
11
m
149,597,870,691 m -- Mean distance between Earth and Sun. Definition:
Astronomical unit
10
12
m
1,429,400,000 km -- Orbital distance of
Saturn
from Sun
5,913,520,000 km -- Orbital distance of
Pluto
from Sun
10
15
m
9.5 x 10
15
m -- 1 light year; Distance travelled by light in one year
4 x 10
16
m -- Distance to nearest star (Proxima Centauri)
10
21
m
1.4 x 10
21
m -- The
Milky Way Galaxy
size(?)
2.1 x 10
22
m -- Distance to
Andromeda Galaxy
10
26
m
10 billion light years -- Estimated distance to
Quasars
- the farthest observed objects in the Universe
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