INTRODUCTION TO MICROSCOPY CELL BIOLOGY
MICROSCOPY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Here are the settings on a microscope:Ocular Lens:10X Scanning Lens:4X Low Power Lens:10X High Power Lens:40XF.O.V for 4X = 3.4 mm You are viewing human blood under high power. You need to calculate the average size of a red blood cell. You estimate that 51 cells will fit across your F.O.V. What is the average size of one of those red blood cells?
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about 60
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About 6
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about 2040
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about 1
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Explanation:
Detailed explanation-1: -A scanning objective lens provides the lowest magnification power of all objective lenses. 4x is a common magnification for scanning objectives and, when combined with the magnification power of a 10x eyepiece lens, a 4x scanning objective lens gives a total magnification of 40x.
Detailed explanation-2: -For example, optical (light) microscopes are usually equipped with four objectives: 4x and 10x are low power objectives; 40x and 100 are powerful ones. The total magnification (received with 10x eyepiece) of less than 400x characterizes the microscope as a low-powered model; more than 400x as a powerful one.
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