McqMate
| Q. |
What is the disadvantage of the Debye- Scherrer film to obtain the d-spacings? |
| A. | temperature required is too high |
| B. | exposure time is long |
| C. | closely spaced arcs are circular |
| D. | cones formed by the diffracted beams are two heavy in weight |
| Answer» B. exposure time is long | |
| Explanation: the disadvantage of using debye-scherrer film method is that exposure times are long and that closely spaced arcs are not well resolved. this is because, although the incident beam enters the camera through a pinhole slit and collimator tube, the beam is somewhat divergent and the spread increases in the diffracted beams. | |
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