By. Saray Navarrete, Jasmine Lopez, Zach Flowers
World War I
Schmidt-Cassegrain telescope (SCT)
A Schmidt-Cassegrain telescope (SCT) is a wide-angle reflecting telescope with a correcting lens that minimizes spherical aberration and a concave mirror that receives light and focuses an image. A second mirror reflects the light through a gap in the primary mirror, allowing the eyepiece or camera to be mounted at the back end of the tube. The Cassegrain Telescope (named for the French sculptor Sieur Guillaume Cassegrain) was developed in 1672; the correcting plate (a lens) was added in 1930 by the Estonian astronomer and lens-maker Bernard Schmidt (1879-1935).
Mechanized textile production
This was beneficial because blankets, clothes, curtains, and any other textile products could be made at a much faster rate.
World War II
The aqualung (1943)
The aqualung lets people go below the surface of the water for an extended amount of time and allows more places to be explored. Jacques-Yves Cousteau (1910-1997) was a French undersea explorer, environmentalist, and innovator. In 1943, Cousteau and the French engineer Emile Gagnan invented the aqualung, a breathing apparatus that supplied oxygen to divers and allowed them to stay underwater for several hours.