MCQOPTIONS
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MCQOPTIONS
| 1. |
Electrons with de-Broglie wavelength X fall on the target in an X-ray tube. The cut-off wavelength of the emitted X-rays is |
| A. | \[{{\lambda }_{0}}=\frac{2mc{{\lambda }^{2}}}{h}\] |
| B. | \[{{\lambda }_{0}}=\frac{2h}{mc}\] |
| C. | \[{{\lambda }_{0}}=\frac{2{{m}^{2}}{{c}^{2}}{{\lambda }^{3}}}{h}\] |
| D. | \[{{\lambda }_{0}}=\lambda \] |
| Answer» B. \[{{\lambda }_{0}}=\frac{2h}{mc}\] | |