Presentation on theme: "The speed of light - NOTES The speed of light, written c, is c = 3.00 x 10 8 m/s, Nothing can travel faster than light, and no object can even travel that."— Presentation transcript:
The speed of light - NOTES The speed of light, written c, is c = 3.00 x 10 8 m/s, Nothing can travel faster than light, and no object can even travel that fast
The speed of light - facts Light could make 7.5 trips around the earth in 1 second Light takes 8 minutes from the sun to here Light takes 4 years from Alpha Centauri, the next nearest star –The distance light travels in one year, about 10 16 meters is called a light year –An image of Alpha Centauri really shows that star 4 years ago, when the light left there
What is light? - NOTES Light is created by accelerating electric charges. This energy travels as an electromagnetic wave.
Electromagnetic waves - NOTES The Electromagnetic Spectrum: the range of light with different frequency and wavelength, shown on p 536
Wavelength is listed along the bottom, increasing from left to right Frequency is listed along the top, decreasing from left to right