Why should you never use the coarse adjustment knob on high power?

Quesiton : Why should you never use the coarse adjustment knob on high power?

Answer: Your hands

Why should you never use the coarse adjustment knob on high power? The coarse adjustment knob should never be used when viewing in high power with a compound microscope. When in high power use the coarse adjustment (the knob smaller than the coarse adj.) to more accurately focus on the subject. How can the answer be improved? The slide may break and/or you may damage the microscope. Why must you be careful when you are focusing with the high-powered lens? Start with the lowest objective (coarse adjustment) then adjust your focus to a better resolution with the fine adjustment. The coarse adjustment knob should never be used when viewing in high power with a compound microscope. When in high power use the coarse adjustment (the knob smaller than the … coarse adj.) to more accurately focus on the subject. Coarse and fine adjustment The coarse adjustment knob should only be used with the lowest power objective lens. Once it is in focus you will only need to use the fine focus. Using the coarse focus with higher lenses may result in crashing the lens into the slide. If you try to move it again the chance is you ll run into the slide and either knock the specimen or even scratch the microscope's lens. Always use the fine adjustment and nothing else once you have set the coarse adjustment to the appropriate level. First the image moves in and out of focus too quickly so that it is difficult to precisely adjust the focus. Second you run the risk of crashing the objective into the slide. Use the coarse focus only with the 4x low power objective. The coarse adjustment knob is used for large adjustments when focusing a microscope by the time ur at the high power ojective lens its lens would be close to the ... • The coarse adjustment knob should NEVER be used on high dry or oil immersion! Base & Arm-flat bottom that supports the ... (4X) or low power (10X) objective and use the coarse adjustment knob to bring the stage as close to the objective lens as possible ... • Most slides that you view with the microscope have been prepared specially so ... slide. Color this knob pink. The fine adjustment knob (D) is also for minute focusing. You use this after you have focused with the coarse adjustment knob . Color this knob tan. QUESTIONS: 1. What two structures on the microscope will you use to focus on your specimen? Why would you never use the coarse adjustment knob on high power ? The coarse adjustment knob may move the lens too far too fast andthe slide may crack and/or the object be squashed. Using the fineadjustment lens will bring the object into focus much moreaccurately.