I learned this today. A fiber optic cable works by sending information encoded in a beam of light. Different technologies send information in different ways. A telegraph and an old style telephone send signals with electric currents. A cell phone uses radio waves. A fiber optic cable sends signals using light. Fiber optic cables were […]
#195 How do fiber optic cables work? Read More »
I learned this today. What is the dark web and how does it work? The dark web is the part of the Internet that can’t be indexed by search engines and is anonymous. To access the dark web, you need to use dedicated software. It cannot be accessed in the same way as the regular
#153 What is the dark web and how does it work? Read More »
I learned this today. Bluetooth is a short range, low power technology that can transmit data over radio waves. Bluetooth works on frequencies in the 2.400 to 2.483.5 GHz short-range radio band. Radio frequencies around the world are generally regulated so that different frequencies don’t get mixed up. That is why different radio stations broadcast
#135 How does Bluetooth work? Read More »
I learned this today. Moore’s Law, that the number of transistors on an integrated circuit will double every two years, is no longer true. Moore’s Law was coined by George Moore in 1965. He was working at Fairchild Semiconductor where he was the director or R&D. Electronics Magazine asked him what was going to happen
#128 Does Moore’s Law still apply today? Read More »
I learned this today. All of the black squares in a QR code represent certain pieces of information. QR stands for Quick Response. They were invented in 1994 by Masahiro Hara. He was working for the Japanese company Denso Wave and he got the idea by looking at the black and white pieces on a
#75 How does a QR code work? Read More »
