McqMate
| Q. |
A convergent beam is obtained by placing which of the following material between the X- ray source and the sample? |
| A. | soil particles |
| B. | single crystal of carbon |
| C. | linear double crystal of graphite |
| D. | bent single crystal of quartz |
| Answer» D. bent single crystal of quartz | |
| Explanation: convergent beam is obtained by placing a bent single crystal of quartz or graphite between the x-ray source and the sample. the orientation of this bent crystal is adjusted so that it diffracts the incident beam and converts it from the divergent beam into a convergent one. | |
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