If you photocopy a black color sheet that paper, that comes the end black. If you photocopy a white paper of paper, that comes the end white. But, interestingly, if you placed a mirror challenge down on a photocopier is comes the end black. Why?


This might depend on the form of copier. If a aircraft wave of light access time a item of paper, it mirrors off in all directions. If it access time a mirror, it shows off at only one angle, the specular reflection edge which satisfies edge of incidence amounts to the edge of reflection. If the irradiate detector in the copier is not situated so the the specular reflection edge is collected by it, then a mirror will show up black.

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This is fun! i have got to shot first! are we talking about a old fashioned black and white photocopier or a colored one? :)

The type of photocopier shouldn't matter, i don't think. What I believe is happening is the the light source is placed so that its picture beneath the mirror sits exterior the sensor's field of view.
This is why you don't gain a huge white mess once scanning photographs or various other glossy papers. Watch the attachment for a moderately crude diagram.
They came to a comparable conclusion, the the reflection was suppressed due to the fact that of the distance between the light resource and sensor.

the whole output will certainly be BLACK because photocopy machine generates the an outcome after the have fun of light to the white portion of the original copy , teacher in your case if winter is placed whole light will certainly reflect earlier that result as a totally black print .
A bright desk lamp illuminates the initial document, and the white locations of the original paper reflect the irradiate onto the surface ar of the photoconductive drum. The locations of the drum that are exposed come light come to be conductive and also therefore discharge come the ground. The area of the drum no exposed to irradiate (those areas that correspond to black parts of the initial document) continue to be negatively charged. The result is a latent electric image ~ above the surface of the drum
Derek, this appears to it is in a an ext intriguing question than an initial meets the eye and also one that probably does not have a directly answer. The relates come the general difficulties of imagery wherein opaqueness, reflectivity and also specularity needs to it is in considered. In particular, together I know it, specularity demands to be identified as the roughness of the surface ar affecting scattering angle of reflect light. (It seems favor this is somewhat perplexed in in contemporary use the the principle in 3D graphics).

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An right mirror has perfect reflectivity, no specularity and also no opaqueness. Moost copying equipments are design for products that deserve to be an ext or much less opaque, high specularity and fairly low reflectivity. I deserve to see at least 3 feasible outcomes because that the mirror experiment, depending upon the style of the copying machine. As pointed out previously, generally the light source and the detector space out that line giving You black color as a result. If the detector and light resource are inline the picture would be a saturated white. If the detector is a ccd camera, the picture would be a slightly out of focus image the the camera (Assuming diffuse illumination).
A sport of the question might be how the photo of showing spheres together in repaint on showing road indications would look at like? interesting if not completely legal experiment...