The United States Constitution requires Senators to be at least 30 years of age. Age does not determine seniority in the Senate. As of October 18, 2015, 5 senators are in their 80s, 18 are in their 70s, 32 are in their 60s, 30 are in their 50s, 14 are in their 40s, and 1 is in his 30s. 1  The median age of currently serving Senators is 7009195864480000000â  62 years, 24 days.
No, it wasnât Thomas Edison. Light bulbs were in use long before Edison applied for the patent in 1879. British inventor Humphry Davy invented an incandescent light bulb in 1801 and created the âarc lampâ in 1809. In 1835, Scottish inventor James Bowman Lindsay demonstrated a constant electric light in Dundee.
The first practical incandescent light bulb. Edison and his team of researchers in Edison's laboratory in Menlo Park, N.J., tested more than 3,000 designs for bulbs between 1878 and 1880. In November 1879, Edison filed a patent for an electric lamp with a carbon filament.redit: View full size image. View full size image. Thomas Edison is usually credited with the invention of the light bulb, but the famous American inventor wasn't the only one who contributed to the development of this revolutionary technology.