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A-Level Biology OCR A

Length Eyepiece Graticule Add Scale Bar Subject Epu

To add a scale bar to a drawing, measure the subject in eyepiece units (epu), convert to real length using the calibrated scale, draw a line of that length below the drawing, and label it with the represented size.

Para añadir una barra de escala a un dibujo, mide el sujeto en unidades del ocular (epu), conviértelas a longitud real usando la escala calibrada, dibuja una línea de esa longitud debajo del dibujo y anota la escala representada.

Front Explain how to use a stage micrometer and eyepiece graticule to add a scale bar to a drawing.
Back Adding scale bar
  • Assuming eyepiece graticule is already calibrated
  • Measure length of your subject in epu
  • Convert epu to real length
  • Draw a line below drawing that is the same length as the subject
  • Add the size the line represents

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