2.4 - Perform calibration of a microscope ocular micrometer and objectively measure cell dimensions with ±5% precision.
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Practice Questions
Test your understanding with targeted questions
What is an ocular micrometer?
💡 Hint: Think about what part of the microscope aids in making measurements.
What is the purpose of a stage micrometer?
💡 Hint: What do we need to align with the ocular micrometer for measurements?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary function of an ocular micrometer?
💡 Hint: Think about what tools help us in measuring at a microscopic level.
True or False: Precision is not critical in scientific measurements.
💡 Hint: Consider why scientists must report precise measurements.
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Challenge Problems
Push your limits with advanced challenges
After calibrating their ocular micrometer, a student finds that 15 ocular divisions equal 750 micrometers. If they measure a cell that spans 8 divisions, what is the expected size in micrometers, and what is the ±5% precision range?
💡 Hint: First, calculate the micrometer size of each division and then scale for the measured cell size.
A student measures a cell width of 4 ocular divisions and finds the average calibration of their ocular divisions to be 90 micrometers each. If this student has a ±5% error rate, what is their range of precision?
💡 Hint: Calculate the total size first, then find 5% of that size to determine the error margin.
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