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5. Some Practical Questions

We now need to try to answer a series of questions that should arise.

(a) What happens in the general case if we ignore the phase and try to recombine with just the intensities?
(b) How can we by-pass or otherwise solve the problem of the phases that cannot be measured?
(c) How can the statements made in section 2 about focusing be reconciled with the solutions of the phase problem which we have just listed and described under (b)?
(d) What determines the accuracy of reproduction of the image?
(e) What complications are introduced by the fact that crystals are three dimensional?

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