Electromagnetic Waves

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Presentation transcript:

Electromagnetic Waves

Light and Matter Emission: light produced by matter Absorption: portion of light incident on matter that is absorbed Transmission: portion of light that travels through medium Reflection: light that bounces (reflects) at an angle equal to its incident angle

Electromagnetic Spectrum c = 300,000 km/s l ´ f = c

Spectrum from a Prism

Example of Spectrum

Types of Spectra in the Lab

Photons of Light The smallest unit of light is a photon A photon is often called a particle of light The Energy of an individual photon depends on its wavelength (frequency) The Energy of a photon is proportional to its frequency: E = h f = hc / l

Electromagnetic Spectrum

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