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| 1. |
One increasing the operating voltage in a x-ray tube by `1.5` times, the shortest wavelength decreases by `26 "pm"`. Find the original value of operating voltage.A. `16 KV`B. `20 KV`C. `22 KV`D. `26 KV` |
| Answer» Use `eV=(hc)/(lambda)` and `(hc)/(lambda-Deltalambda)=1.5eV` | |