Physics Reference Tables Page 4
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2
3
4Mathematical Formulas
Wave Phenomena
1
c = speed of light
T
a
2
b
2
c
2
c
f
in a vacuum
a
a
sin
v
f
f = frequency
c
n = index of
b
b
c
cos
n
refraction
c
v
T = period
a
n
sin
n
sin
tan
b
1
1
2
2
v = speed
n
sin
2
Circumference of a circle = 2 r
angle
c
n
1
critical angle
Area of a rectangle = length width
c
of incidence
Area of a triangle = 1
n v
n v
base height
1 1
2 2
2
= wavelength
Electromagnetic Spectrum
(measurement in meters)
4
3
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
–12
–13
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
X rays
Microwaves
Infrared
Ultraviolet
Gamma
Radio
rays
waves
Shorter Wavelength
Longer Wavelength
Visible Light
Red
Orange
Yellow
Green
Blue
Violet
´
´
´
´
´
´
´
–7
–7
–7
–7
–7
–7
–7
7.0
10
6.5 10
5.9 10
5.7 10
4.9 10
4.2 10
4.0 10
NCDPI Reference Tables for Physics (2012) Version 2
Page 4
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