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# The duality of the light'

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### The duality of the light'

1. 1. The duality of the lightTesa Reimat, Anna Solà and Gisela Solé
2. 2. The duality of the lightThe lightWaveDefinitionand anatomyPropertiesWaves’behaviorParticle
3. 3. Definition and anatomyAnatomy•Rest position: the centre of the wave.•Crest: the point on the wave with the maximum positive displacementfrom the rest point.•Trough: the point on the wave with the maximum negative displacementfrom the rest point.Definition:A wave is a disturbance that travels through a medium from one location to another location.
4. 4. Propertiesλ 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.
5. 5. Waves’ behaviorThe interference is a phenomenon in which two waves superimpose to form aresultant wave of greater or lower amplitude.When this process occurs, the waves produce an interference pattern like the one inthe picture.
6. 6. Corpuscular theoryLight is made by a flux of brightparticles which name is Corpuscles.This particles explain their rectilinearpropagation, their reflection onopaque surfaces and their refractionwhen the environment changes.
7. 7. ExperimentInvented by William Crookes (1873)4 paddles1 shaftGlass capsule
8. 8. ExperimentWhat was supposed to happen? What happens?
9. 9. Experiments