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Ask iit jee aieee pet cbse icse state board experts Discussion Response Post to: when you want to take a film from tv screen by mobile phone u see noise bands on film why?
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edison (4912)

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We see 'flickering' because the refresh rates of the display device and the recording instrument (a camera) are closely matched. However, the cameras used by movie makers are not the same as the commercially available handycams etc. They are expensive and extremely high resolution devices. This would obviously imply that their refresh rates are very high as compared to the simple tvs and monitors that they capture while filming a movie.

The Scientist does not study nature because it is useful; he studies it because he delights in it, & he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing, life would not be worth living. Ofcourse I do not here speak of that beauty that strikes the senses, the beauty of qualities & appearances; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty which comes from the harmoniuos order of the parts, & which a pure intelligence can grasp.
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