
w.r.t. a metallurgical microscope, how do you determine if the given obj. lens is dry/wet if it is unmarked?
It'd be rare that there would be absolutely no markings on a wet lens. Usually a circumferential stripe/groove would be present. Beyond certain magnification you're very likely to have a wet lens. If it's a 100x lens, I bet it's wet.
You can always use immersion oil and see if you get better image!
Ejs open source converging & diverging Lens object image high school java applet
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