1. Electromagnetic Waves

2. Light and Matter Emission: light produced by matter
Absorption: portion of light incident on matter that is absorbed
Transmission: portion of light that travels through medium
Reflection: light that bounces (reflects) at an angle equal to its incident angle

3. Electromagnetic Spectrum
c = 300,000 km/s
l ´ f = c

4. Spectrum from a Prism

5. Example of Spectrum

6. Types of Spectra in the Lab

7. Photons of Light The smallest unit of light is a photon
A photon is often called a particle of light
The Energy of an individual photon depends on its wavelength (frequency)
The Energy of a photon is proportional to its frequency: E = h f = hc / l

8. Electromagnetic Spectrum