1. Incandescent Light Bulb 22 Inventors of incandescent light bulbs before Edison Heated metal filament glows when heated and is protected from air by glass and a strong vacuum Credited for invention for three reasons ◦ Long lasting carbonized bamboo filament (1200+ hours) ◦ Cost effective for mass production ◦ High resistance which made it economically viable

2. Thomas Edison’s Influence on Today’s World

3. Phonograph Influence First device that could record and reproduce sounds Made CD’s, MP3’s, & radio possible Helped create the music industry

4. Light Bulb Influence Though invented by others, Edison made it a commercial success LED TV lights are possible because of the light bulb Las Vegas, a city with billions of lights was made possible because of cheap, highly resistant lights

5. Kinetoscope Influence Largely developed by Edison’s employee William Dickson Though not true video gave the illusion of motion Gave birth to American Cinema Created the pathway for what is now a multi-billion dollar industry

6. Dickson Greeting (1891)