Thursday, September 12, 2013
What should you do when a musician comes to your door?
Pay him and take your pizza.
When it comes to supersonic travel, at what g-force do people start to lose their color vision?
At 4Gs—four times the force of gravity. The phenomenon is called graying out. At 4.5Gs, an individual may lose his or her vision. (Humans endure 1G during normal daily living.)
THE SCIENCE OF TV
What’s the difference between analog and digital TV?
In the good old days of analog television broadcasting, the TV camera at the studio converted visual images into an electronic signal. In fact, analog TVs worked because they functioned, mechanically speaking, as TV cameras in reverse: At the TV station, light, in the form of a visual image, entered the camera, into the front end of a specialized cathode-ray tube called a vidicon. The vidicon converted the images into an electronic signal that the TV station broadcast (along with the audio signal) over the air to your TV. Inside your television, the process was reversed: The video signal was fed into the back end of a cathode-ray tube that was very similar to a vidicon. The cathode-ray tube then converted the electronic signal back into the visual image and displayed it on the front surface of the tube—the TV screen. Digital TV signals, however, are bits of computerized code; at their most basic, they are a “1” or a “0.” A digital converter in a modern television, put simply, takes those bits and converts them into images and sound.
The map on Bonanza’s credits has Carson City north of the Ponderosa. It’s really to the east.