Light/wavelength/frequency/de broglie

Light

when an electron moves from a high energy level to one of a lower energy, emergy is released in the form of light

Continuous spectra

The type of spectra is the pattern obtained when light a mixed source is analyzed (sunlight)

Why is sunlight a continuous spectra?

There are no breaks between the colours. One flows into the next. (ex.rainbow)

Each colour represents light of a specific energy and wavelength

continuous spectra

Line spectra

The pattern you get when light from a pure light source is analyzed

2 theories about light

wave theory and particle theory

Wave concept 

These light waves differ from others ONLY because they do not need a medium to form.

The waves are called

Electromagnetic waves

electromagnetic waves are formed

as a result of vibrations in an electric and magnetic field, therefore will occur even in a vaccum

wavelength (also called lambda) is

the distance from peak to peak or trough to trough 

the number of waves that passes a given point per unit of time (s^-1 per sec same as Hz hertz) is

Frequency

frequency is represented by the greek symbol

nu (v)

Who suggested that energy is directly proportional to the frequency?

Max Planck

Planks constant “h”

6.63 × 10^-34 J x s

Particle theory of lights

De broglie wave theory

What did de broglie theorized 

particles hold the same properties as waves

De Broglie derived his famous equation by using some of

Einsteins and Plancks equations to come up with a general case for matter waves