1. Flame Test and the EMS

2. Absorption and Emission of Light in a Flame When a substance is heated in a flame, the substances electrons absorb energy from the flame.

3. Absorption and Emission of Light in a Flame This absorbed energy allows the electrons to be promoted to EXCITED energy levels and the electrons are “kicked up notch” to a higher energy level.

4. 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).

5. 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!

6. 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.

7. 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 WAVELENGTHS).

8. Absorption and Emission of Light in a Flame The color of light varies from substance to substance, depending on the electron configuration.

9. How is each substance unique? Difference between energy levels Exact energy of the emitted photon Corresponding wavelength and color

10. EMS The visible portion of the EMS is only a small part of the entire spectrum.

11. Types of Emissions Radio waves Used for radio and television communication

12. Types of Emissions Microwaves Used in radar signals and microwave ovens

13. Types of Emissions Infrared radiation Given off in the form of heat

14. Types of Emissions Visible Light oSmall portion of the EMS oWavelength region between 400 and 700nm oAs the color of light changes, so does the amount of energy it possess

15. Types of Emissions Ultra Violet (UV) Given off by the SUN

16. Types of Emissions X-Rays Used to detect bones and teeth

17. Types of Emissions Gamma Rays May be given off by radioactive materials

18. Types of Emissions