AM Ampère
1775-1836
OERSTED, H. C.
1777-1851
C. F. Gauss
1777-1855
M. Faraday
1791-1867
J. C. Maxwell
1831-1879
H. R. Hertz
1857 - 1894
M. Planck
1858 - 1947
A. Einstein
1879 - 1955
Images are taken from search engine Google Images
N. Bohr,
1885-1962

A plane polarized sinusoidal wave!

VISIBLE LIGHT color l (Å) f (*10 14 Hz) Energy (*10 violet 4000 4600 7.5 - 6.5
5.0 - 4.3
indigo 4600 - 4750 6.5 - 6.3
4.3 - 4.2
blue 4750 - 4900 6.3 - 6.1
4.2 - 4.1
green 4900 - 5650 6.1 - 5.3
4.1 - 3.5
yellow 5650 - 5750 5.3 - 5.2
3.5 - 3.4
orange 5750 - 6000 5.2 - 5.0
3.4 - 3.3
red 6000 8000 5.0 - 3.7
3.3 - 2.5
-19 J)

DISRETE SPECTRA – ABSORPTION AND EMISSION

Intensity = Lifetime x
# atoms energized

CONTINOUS SPECTRA

BASIC PROPERTIES OF LIGHT
1) Light is electromagnetic waves – radiation
2) It travels through empty space
3) The speed is constant as a function of wavelength
4) It is polarized depending on direction or rotation of E
5) Light are emitted or absorbed in discrete chunks of energy
6) These packets of energy – photons - have energy E=hv
7) Photons are released as a response to jumps in atomic / molecular energy levels (from Bohr’s model of the atom)
8) Light is both a particle (photon) and a wave – depends how we observe it.
9) Intensity is directly related to number of photons emitted from an object.
10) Objects emits light in form of continuous or discrete spectra – depending mainly on density and temperature.
11) Light has wavelike behavior: it reflects, refracts, diffracts and interfere...

Basics of a hyperspectral imager – a camera that that images as a function of wavelength!

Basics of an airborne hyperspectral imager- bush broom (Zsolt, 2006)

VEGETATION – ROCKS - SEA & FRESH WATER

VEGETATION UNDER WATER

SCRIMPS: SKALL, SKALL IKKE!

Douglas C. Giancoli, Physics for Scientists and Engineers,
2. ed. , Prentice Hall, Englewood Cliffs, New Jersey
07632, US, ISBN 0-13-669201-X, US, 1988.
Astronomy Notes (2004 Edition) by Nick Strobel, ISBN
0073122491, http://www.astronomynotes.com/
*Sample data are from experiments at Fiskeriforskning in
Tromsø and from airborne campaigns at UNIS.