Flame TestFlame TestFlame TestFlame Test

and the EMSand the EMSand the EMSand the EMS

Absorption and Emission

of Light in a Flame

When a substance is

heated in a flame, the

substances electrons

absorb energy from the

flame.

Absorption and Emission

of Light in a Flame

This absorbed energy allows

the electrons to be

promoted to EXCITEDXCITEDXCITEDXCITED

energy levels and the

electrons are “kicked up

notch” to a higher energy

level.

Absorption and Emission

of Light in a Flame

The electrons naturally

want to make a transition,

or RELAX, back down to

the ground state (lowest

energy level).

Absorption and Emission

of Light in a Flame

When an electron makes a

transition from a higher

energy level to a lower

energy level, a particle of

light called a photon is

emitted.We are PHOTONS!

Absorption and Emission

of Light in a Flame

The energy of a photon is

equal to the difference in

energy between the

excited state and the

state to which the

electron relaxes.

Absorption and Emission

of Light in a Flame

The energy of the emitted

photon determines the color

of light observed in the flame

(expressed in

WAVELENGTHSAVELENGTHSAVELENGTHSAVELENGTHS).

Absorption and Emission

of Light in a Flame

The color of light varies

from substance to

substance, depending on

the electron configuration.

How is each

substance unique?

•Difference between

energy levels

•Exact energy of the

emitted photon

•Corresponding

wavelength and color

EMS

The visible portion of the

EMS is only a small part

of the entire spectrum.

Types of Emissions

Radio wavesRadio wavesRadio wavesRadio waves

Used for radio and

television communication

Types of Emissions

MicrowavesMicrowavesMicrowavesMicrowaves

Used in radar signals and

microwave ovens

Types of Emissions

Infrared radiationInfrared radiationInfrared radiationInfrared radiation

Given off in the form of heat

Types of Emissions

Visible LightoSmall portion of the EMS

oWavelength region between 400 and 700nm

oAs the color of light changes, so does the amount of energy it possess

Types of Emissions

Ultra Violet (UV)

Given off by the SUN

Types of Emissions

XXXX----RaysRaysRaysRays

Used to

detect

bones

and teeth

Types of Emissions

Gamma Rays

May be given off by

radioactive materials

Types of Emissions