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GCSE Biology Paper 1 (9-1 Exams)

Stage Objective Adjustment Slide Coarse Knob Move Lens

To use a light microscope, clip the slide, select the lowest power objective lens, focus using the coarse adjustment knob, then refine with the fine adjustment knob, and switch to higher magnification if necessary.

To use a light microscope: clip the slide, select lowest power lens, focus with coarse knob, refine with fine knob, and change to higher magnification if needed.

Front What are the steps to set up and use a light microscope to observe the prepared slide?
Back
  1. Clip the slide onto the stage
  2. Select the lowest-powered objective lens 
  3. Use the coarse adjustment knob to move the stage up to just below the objective lens
  4. Look down the eyepiece. Use the coarse adjustment knob to move the stage downwards until the image is roughly in focus.
  5. Adjust the focus with the fine adjustment knob, until you get a clear image of what's on the slide.
  6. If you need to see the slide with greater magnification, swap to a higher-powered objective lens and refocus.

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