when we seea white object trough red cellopen paper,it seems red.why?a leaf through the paper seems black.Why?

Question

Plz give logical and descriptive answers.

Answer 1

Any colour transparency will allow only the same colour through it . All the other colours will be absorbed by the transparency sheet. When white colour is sent through a red transparency other than red all colours will be absorbed by the sheet except red. If we look green leaves through the red transparency as the green colour is absorbed by the transparent sheet the leaf will look black.

Answer 2

Well..it has to do with light wavelengths... White paper will reflect ALL wavelenghts. So also red wavelengths, which is going through your red filter (cellophane), and makes it appear red. A leaf contains chlorophyl (the green stuff), which absorbs mainly red light wavelength, so red light is not reflected, and therefore it appears black through your filter. Your filter will only let through red light, and not e.g. green light which WOULD be reflected by your leaf.

Answer 3

Red only allows red light through. White objects appear so beacuse they reflect all wavelengths of light- making white objects appear red when viewed through the filter. Green objects appear so because we see the reflected green light... which is stopped by the red filter- making it appear black.

Answer 4

http://en.wikipedia.org/wiki/White