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Light.

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Presentation on theme: "Light."— Presentation transcript:

1 Light

2 The dual nature of light
Is it a wave? 1700s Christian Huygens proved that light acted like a wave b/c light spreads out Or is it a particle? In 1905, Albert Einstein proved that light acted like little particles we call ‘photons’

3 There are 2 types of waves
Longitudinal (Sound) and Transverse (Light, EM)

4 The wave When a wave travels, energy moves along a wave but there is no movement of particles along the wave. A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves.

5 5 Parts of a Transverse Wave
Crest, trough, wavelength, rest position, amplitude (displacement from rest position…not total height of the wave)

6 Review What is another name for a light wave?
What is another name for an Electromagnetic wave? How many parts are there on a tranverse wave diagram? Transverse wave 5

7 Review..find the 5 parts of a transverse wave diagram


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