Can one make a laser out of cardboard? (CROSBI ID 631061)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Tadić, Tvrtko ; Burdzy, Krzysztof
engleski
Can one make a laser out of cardboard?
We consider two dimensional and three dimensional semi-infinite tubes made of ``Lambertian'' material, so that the distribution of the direction of a reflected light ray has the density proportional to the cosine of the angle with the normal vector. If the light source is far away from the opening of the tube then the exiting rays are (approximately) collimated in two dimensions but are not collimated in three dimensions. An observer looking into the three dimensional tube will see ``infinitely bright'' spot at the center of vision. In other words, in three dimensions, the light brightness grows to infinity near the center as the light source moves away.
random reflections ; stopped random walks
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o prilogu
524-524.
2016.
objavljeno
Podaci o matičnoj publikaciji
Abstracts of Papers Presented to the American Mathematical Society, vol. 37 (2016) no.1
Savage, Carla
Seattle (WA): American Mathematical Society (AMS)
0192-5857
Podaci o skupu
Joint Mathematics Meetings
predavanje
06.01.2016-09.01.2016
Seattle (WA), Sjedinjene Američke Države