Azonositó
jel:
Fizika angol nyelven — emelt szint
4. We are looking at a point-like light source which is located at a distance of 2 meters from us and radiates light in all directions evenly. The power of the light source is 10 W, the wavelength of the emitted light is x = 450 nm.
Approximately how many photons pass through our pupil in a second, if the diameter of our pupil at the time of the observation is 4 mm?
c = 3-10s—, /i = 6.62-10_!4 Js. s
irasbeli vizsga 1112
13/16
Total
12 points
2012. majus 17.