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ELECTRONS AND THE ELECTROMAGNETICPowerPoint Presentation

ELECTRONS AND THE ELECTROMAGNETIC

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ELECTRONS AND THE ELECTROMAGNETIC

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ELECTRONS AND THE ELECTROMAGNETIC

SPECTRUM

- Wave Characteristics
- WAVELENGTH – the distance between two
consecutive wave peaks; symbolized by

the Greek letter lambda (λ)

- FREQUENCY – indicates how many wave
peakspass a certain point at a given

time; symbolized by the Greek letter nu (ѵ)

- Wave Characteristics
- AMPLITUDE– height from originto
crest or origin to trough.

- SPEED – ALLwaves travel at a speed
of 3.00 x 108m/s

- Max Planck – matter can gain or lose energy only
in a small, specificamount called a quantum.

- Albert Einstein - light is made up of a stream of
tiny particles called photons.

- A photon carries a quantum (a discreet amount)
of energy.

- C the speed of light is 3.00 x 108 m/s
- λ (lambda), the wavelength is normally given in the SI units of m, cm or nm

- The speed of light is equal to the frequency of
the wavemultiplied by its wavelength.

- c = λѵ
- We can rearrange the equation if we are trying
to find wavelength or frequency.

λ= c/ѵ or ѵ= c/ λ

- What is the wavelength of a microwave having a frequency of 3.44 x 109 Hz?
- We are looking for wavelength so we will use λ= c/ѵ
- λ= 3.00 x 108m/s
3.44 x 109Hz

- λ= .872 X 10 -1 m or 8.72 X 10 -2 m