E3N2_Oct13[1] - Electromagnetic Waves Visible Light and the...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Electromagnetic Waves
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Visible Light and the Electromagnetic Spectrum
Background image of page 2
A Thermal Spectrum
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Interaction of Light and Matter Observed Properties There are only 4 ways light and matter interact 1) Transmitted 2) Absorbed 3) Reflected/Scattered 4) Emitted Thermal radiation Idealized radiator is called a Black Body Completely absorbs and emits light at all wavelengths
Background image of page 4
Black Body Radiation A Spectrum (plural spectra ) is a plot of the intensity of light as a function of either frequency or wavelength When an object is heated, it glows and we can measure its spectrum. Ideally, a heated object radiates as shown, with a wavelength where the intensity is a maximum. The characteristic c o l o r is defined by the wavelength of the maximum intensity, this is directly related to its temperature. Black Body Radiation
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Thermal Radiation Curves: Black Body Radiation Planck’s law Describes the overall shape of the BB curve It has a central peak and falls off sharply on both sides of
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 16

E3N2_Oct13[1] - Electromagnetic Waves Visible Light and the...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online