A computer eyeshade seem middle-of-the-road to a human eye but............?
Answer:
Computer eyeshade is made up of tiny picture elements called as pixels. For our discussion we can purloin it as tiny bulbs assembled very close to respectively other. These tiny bulbs do not glow continuously.
Instead they really flicker at a intensely high frequency which a commonplace human eye cant see. The frequency of flickering is that much high.
But when view with a camera it can be see because the refresh rate for cameras is severely less than that of a human eye. So the camera cant adopt for that glorious frequencies and so the flickerings are viewed as lines scrolling through the computer peak.
Its true that computer screen (i.e) the pixels flicker.
Monitors own a refresh rate, it cant be see flickering with the human eye, but next to a camera, you can see the flickering. Same goes beside a normal TV.
the lines one refreshed on the computer peak and the tv are not the same, going away the illusion of flickers.
Maybe it have to do with the wavelength at which the signal from the computer monitor oscillate in comparison near the frequency the camera is able to transcription. In the points there are flickers, I don`t know there is interference cause by frequency differences.
Simply put; Refresh rate.
Video recorders; old-fashioned video tape ones; aswell as clean digital camcorders; all journal at different rates. (ie how fast/how many frames per second) it paperwork to give you the apparition of motion to the naked eye.
The flickering is picked up on video where on earth as not to your eye because the display rate of your monitor (refresh rate) is not sync'd with the narrative rate of your recording device.
Where as the video recording device for arguments sake; may record 5 frames per second; and your computer may display 6 frames per second (this is a gross exaggeration and fictitional numbers) You won't discern and lines for the first while; however the longer the recording go on; the more 'out of sync' they become. The recorder will visually record this as a 'line' (flicker)
To remedy this you can collectively adjust recording rate/speed on your camcorder; and adjust energize rates on your monitor. I will notice this problem just exsists on CRT monitors. Flatscreen LCD monitors you will not notice any flicker.
Hope that help :)
Because there is a difference contained by hertz. The hertz measures how many times the peak flashes per second.
Maybe this will explain better than I can.
http://systems.webopedia.com/term/s/scre...
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