Things You Thought You Knew – The Karman Line, LED Bulbs, and Banking Turns with Neil deGrasse Tyson

LED Efficiency

LED bulbs revolutionized lighting by eliminating the heat associated with traditional incandescent bulbs. Neil deGrasse Tyson explains that incandescent bulbs waste energy by emitting infrared radiation, which is why they get hot. In contrast, LEDs produce light without heat, making them more energy-efficient and safer to touch 1. This innovation was made possible by the discovery of the blue LED, which allowed for the creation of white light by combining red, green, and blue LEDs 2.

The brilliant thing about LEDs is they're not glowing from heat. It's actual light coming out at those frequencies.

--- Neil deGrasse Tyson

This advancement not only saves energy but also reduces the risk of burns from handling hot bulbs.

   

Spectral Science

The science behind LED lighting involves manipulating the light spectrum to produce various colors. Neil deGrasse Tyson highlights that LEDs use RGB diodes to create any color, including white light, by controlling the ratios of red, green, and blue light 2. This differs from incandescent bulbs, which emit light by heating a filament until it glows, wasting energy in the form of infrared radiation 1.

You combine RGB with light, and you get white light. The thing about LEDs is they're not glowing from heat.

--- Neil deGrasse Tyson

This technology not only enhances color intensity but also offers a more efficient way to illuminate spaces.