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The duality of the lightTesa Reimat, Anna Solà and Gisela Solé
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The duality of the light
The light
Wave
Definition and anatomy Properties Waves’
behavior
Particle
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Definition and anatomy
Anatomy•Rest position: the centre of the wave.•Crest: the point on the wave with the maximum positive displacement from the rest point.•Trough: the point on the wave with the maximum negative displacement from the rest point.
Definition:A wave is a disturbance that travels through a medium from one location to another location.
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Properties
λ Wavelength: the distance from crest to crest. It is represented by λ (lambda).A Amplitude: the distance from the rest position to the crest or the trough.v Frequency: the number of waves per second.T Period: the amount of time it takes to complete one cycle. It is represented by the letter T.c Velocity: the speed the wave travels. It is calculated by the equation v = λ / T.
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Waves’ behavior
The interference is a phenomenon in which two waves superimpose to form a resultant wave of greater or lower amplitude.When this process occurs, the waves produce an interference pattern like the one in the picture.
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Corpuscular theory
Light is made by a flux of bright particles which name is Corpuscles. This particles explain their rectilinear
propagation, their reflection on opaque surfaces and their refraction
when the environment changes.
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Experiment
Invented by William Crookes (1873)
4 paddles
1 shaft
Glass capsule
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Experiment
What was supposed to happen? What happens?
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Experiments
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Thanks foryour attention!