The greatest scientist

Thomas Alva Edison

11th February, 1847American scientist and inventorthe 7th and the last child

mother (school teacher)

father (grocery shopkeeper)

started to talk at age 4

attended school for only 3 months

Background

built a science laboratory at basement at age 10

train accident at age 15

suffered from ear problem

Background

became a telegraph assistant at age 16

Contributions

kinetoscope

kinetographlight bulb

phonograph

telegraph

The structure of a bulb

filament

support wires

inert gas惰性氣體

wires(for electricity to pass through)