What is a graticule on a microscope?

The eyepiece graticule is a glass disc fitted into the eyepiece of the microscope. These can be fitted to existing eyepieces or eyepieces can be purchased with graticules already fitted. The disc is marked with a fine scale from 0 to 100.

Just so, what is the accuracy of the micrometer?

The micrometer screw gauge. If a more accurate measurement is needed a micrometer screw gauge can be used. This normally has accuracy of 0.01 mm and is used to measure objects no more than a few millimetres across.

What is the use of a micrometer?

A micrometer is a tool used for the precise measurement of very small objects. A micrometer can measure the depth, length and thickness of whatever object fits between its anvil and spindle. It is commonly used in mechanical engineering and machining applications.

How accurate is a vernier caliper?

Vernier calipers commonly used in industry provide a precision to 0.01 mm (10 micrometres), or one thousandth of an inch. They are available in sizes that can measure up to 1,829 mm (72 in).

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The middle chamber of a traditional chest drainage system is the water seal . The main purpose of the water seal is to allow air to exit from the pleural space on exhalation and prevent air from entering the pleural cavity or mediastinum on inhalation.

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