Inverter

A parabolic (or paraboloid or paraboloidal) reflector (or dish or mirror) is a reflective surface used to collect or project energy such as light, sound, or radio waves.

Before the light bulb was invented, people had figured out how to put a reflector behind it, focus it a little bit put lenses in front of it, focus it a little bit better.

So melanin was recruited, in our lineage, and specifically in our earliest ancestors evolving in Africa, to be a natural sunscreen.

) Surrounded by a U 238 reflector tamper, the Fat Man's pit was brought close to critical mass by the neutron reflecting properties of the U 238.

In 1876 a French engineer, A. Mangin, invented what has come to be called the Mangin mirror, a concave glass reflector with the silver surface on the rear side of the glass.

So if I put this inside this water here, you can see a silver reflective coating around it, and that silver reflective coating is the layer of air that's protecting the water from touching the paddle, and it's dry.

Other methods of geoengineering that is, consciously manipulating the climate include painting the roofs of houses white in order to increase the reflection of sunlight, covering deserts with reflective plastic, and fertilizing the seas with iron in order to increase the absorption of CO2.