The duality of the lightTesa Reimat, Anna Solà and Gisela Solé

The duality of the light

The light

Wave

Definition and anatomy Properties Waves’

behavior

Particle

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.

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.

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.

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.

Experiment

Invented by William Crookes (1873)

4 paddles

1 shaft

Glass capsule

Experiment

What was supposed to happen? What happens?

Experiments

Thanks foryour attention!