Solution to task 628 from Chertov's for extramural stud
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628. A monoenergetic electron beam illuminates a spot with a radius of r ≈ 10-3 cm in the center of the screen of a cathode-ray tube. Using the uncertainty relation, find how many times the uncertainty Δx: the coordinates of an electron on the screen in the direction perpendicular to the tube axis are less than the spot size r. The length L of the cathode-ray tube is taken equal to 0.50 m, and the voltage U, accelerating the electron, equal to 20 kV.
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- Content description 26,84 kB
- Added to the site 17.12.2020
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Cumulative discount
200 $ | the discount is 15% |
100 $ | the discount is 10% |
50 $ | the discount is 7% |
20 $ | the discount is 5% |
10 $ | the discount is 3% |
5 $ | the discount is 2% |
1 $ | the discount is 1% |
Check your discount
Amount of purchases from the seller: $
Your discount: %
0.04 $ gift card for a positive review