1. DO NOW In your notes… answer the following question using bullet points: –What do you know about light? Allows us to see Allows plants to make food Causes sunburn Form of energy

2. Properties of Light

3. Essential Question How do astronomers learn/study what is beyond our atmosphere? Objectives: Investigate the properties of light Explain the role of light in astronomy

4. Light is the common term for electromagnetic radiation traveling through space as waves. Speed of light = 3.0x10 8 m/s

5. Creation of light Light can be created in 3 ways: 1.The Sun 2.Light Bulbs – Electricity or batteries 3.Chemicals – Fireworks, explosion, chemical reactions

6. Properties Refraction The bending of light as it passes between materials of different optical density

7. Reflection The abrupt change in direction or bouncing off of a wave

8. Electromagnetic Spectrum

9. A continuum of all electromagnetic waves arranged according to frequency and wavelength Wavelength – Length of the wave Frequency – how often the wave occurs in a given time

11. Color Visible Light Spectrum (ROY G. BIV) White light is a mixture of every color of the rainbow Black is the absence of color Observed color – the color seen is reflected back to your eyes

13. Station Directions Station 1 – Penny in Dish Pencil and Ruler Station 2 – Flame Test Station 3 – Spectroscope Station 4 – Lenses Station 5 – Polarized Paper Station 6 – Electromagnetic Spectrum Packet READ THE DIRECTIONS!!

14. Safety Concerns Goggles MUST be worn by all students at Station 2 for the entire duration of the investigation! Long hair must be pulled back!

15. If there arent any questions…. BEGIN THE INVESTIGATION!!!