Microscopy Measurement Questions

An eyepiece graticule is primarily used to:

• Illuminate the specimen

• Measure the size of objects viewed under the microscope

• Focus the image

• Increase the magnification

Explain how to calibrate an eyepiece graticule using a stage micrometer. Include the steps involved in the process.

If a specimen measures 15 divisions on the eyepiece graticule and each division corresponds to 2 micrometers on the stage micrometer, what is the actual size of the specimen in micrometers?

The stage micrometer is a tool used to view specimens, while the eyepiece graticule is a fixed measurement scale used for calibration.

• True

• False

Describe the significance of using the correct units (e.g., micrometers, millimeters) when reporting measurements taken with an eyepiece graticule and stage micrometer.

Match the following terms with their correct descriptions:

• Eyepiece Graticule

• Stage Micrometer

• Micrometer

• Calibration

The eyepiece graticule is often calibrated against a stage micrometer to ensure accurate _______________ in measurements. The units typically used for measuring cells are ____________ and ____________.

• Measurements

• micrometers

• millimeters