A simple but hard question.?

Question

Tell me who invented the light bulb.

Hint :- If u feel it's thomas alva edison, you're wrong. He just improved the original design of the light bulb.

Answer 1

In 1806 Humphrey Davy

Answer 2

Swan

Answer 3

1878 - Sir Joseph Wilson Swan (1828-1914), an English physicist, was the first person to invent a practical and longer-lasting electic lightbulb (13.5 hours). Swan used a carbon fiber filament derived from cotton.

Answer 4

Humphry Davy

Answer 5

he first electric light was made in 1800 by Humphry Davy, an English scientist. He experimented with electricity and invented an electric battery. When he connected wires to his battery and a piece of carbon, the carbon glowed, producing light. This is called an electric arc.

Answer 6

Joseph Swan

Answer 7

The experiment was first performed by Humphry Davy,in 1802,in Great Britain.In 1809, Davy created the first arc lamp by making a small but blinding electrical connection between two charcoal rods connected to a 2000 cell battery. Demonstrated to the Royal Institution in 1810, the invention came to be known as the Arc lamp.