Debate and discussion of any biological questions not pertaining to a particular topic.

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Post by MIA6 » Thu Oct 05, 2006 3:08 am

1. In a microscope, what's the Uses of Coarse-focus knob and Fine-focus knob? I think theses two knobs have different uses?
2. The resolving power of an optical system is its ability to distinguish clearly and in detail between two points which lie very close to each other. I don't understand what 'in detail between two points which lie very close to each other' means.
Hope you can tell me, thanks.

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King Cobra
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Post by Dr.Stein » Thu Oct 05, 2006 6:10 am

1. Of course to focus your view, coarse knob to go faster to find your object. After you found it, it'd be better to use the fine one to prevent a crash between objective lense and your preparation. This fine knob also is needed when you are into high magnification i.e. 400x, 1000x or more ;)

2. I think it refers to "distant" or something :?

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