Data CDs, on the other hand, hold anything. Theyâre just another media on which you can store files from your computer. The format of a data CD is even similar to the format of your computerâs hard disk. It has a file system, directories, folders and files. But your car stereo knows nothing about file systems, folders and the like. All it knows is how to stream that raw audio data off of an audio format CD. While your computer can do that it too, itâs also a general-purpose device that understands the format of a data CD. But thatâs not the only difference. Remember that I said that an audio CD is uncompressed.
*To calculate optimal viewing distance in meters instead of feet, the formula is pixel pitch x 2.5. How to estimate optimal display size. Modular, built-to-order Christie Velvet LED display tiles can be configured into virtually any size and shape.
How far can I see with a telescope? Pretty far. Usually this question is asked when comparing two scopes, as in can I see farther with this telescope?. A bigger scope will show you more, but not necessarily farther. You don't really need to see farther, though. With the unaided eye, you can see 2.8 million light-years to the Andromeda Galaxy. Even a very small telescope can show you an object called 3C273, a quasar in Virgo that is 3 billion light-years distant. But most objects that are interesting to look at aren't that far away. What you really want with a telescope is light-gathering power to see fainter things, not farther things.