Properties of light a tool in energy and environmental physics
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Properties of light – A tool in Energy and Environmental Physics. F. Sigernes A trial lecture @ NTNU. A-M Ampère 1775-1836 . M. Faraday 1791-1867. OERSTED, H. C. 1777-1851 . C. F. Gauss 1777-1855 . J. C. Maxwell 1831-1879. H. R. Hertz 1857 - 1894. M. Planck 1858 - 1947 .

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Properties of light a tool in energy and environmental physics l.jpg

Properties of light – A tool in Energy and Environmental Physics

F. Sigernes

A trial lecture @ NTNU


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A-M Ampère Physics

1775-1836

M. Faraday

1791-1867

OERSTED, H. C.

1777-1851

C. F. Gauss

1777-1855

J. C. Maxwell

1831-1879

H. R. Hertz

1857 - 1894

M. Planck

1858 - 1947

  • Einstein

  • 1879 - 1955

N. Bohr,

1885-1962

Images are taken from search engine Google Images


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A plane polarized Physics

sinusoidal wave!


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VISIBLE LIGHT Physics



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Nordkvist (2006) Physics

Intensity = Lifetime x

# atoms energized



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BASIC PROPERTIES OF LIGHT Physics

  • Light is electromagnetic waves – radiation

  • It travels through empty space

  • The speed is constant as a function of wavelength

  • It is polarized depending on direction or rotation of E

  • Light are emitted or absorbed in discrete chunks of energy

  • These packets of energy – photons - have energy E=hv

  • 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...


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“Spectroscopy – is the tool to study the properties of objects.”

Basics of a hyperspectral imager –

a camera that that images as a function of wavelength!




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VEGETATION UNDER WATER (Zsolt, 2006)



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REFERENCES (Zsolt, 2006)

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.


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