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Questions and Answers
What is the meaning of the word 'microscope'?
What is the meaning of the word 'microscope'?
- To see objects distinctly
- To inspect objects too small to be seen by the unaided eye (correct)
- To magnify small objects
- To examine small objects
What does a magnification of '100x' mean?
What does a magnification of '100x' mean?
- The image is 100 times smaller than the actual object
- The image is 100 times bigger than the actual object (correct)
- The image is 100 times closer to the actual object
- The image is 100 times clearer than the actual object
What determines the total magnification in a microscope?
What determines the total magnification in a microscope?
- The power of the ocular and objective being used (correct)
- The type of light source used
- The size of the object being viewed
- The distance between the lenses
What is resolution in the context of microscopy?
What is resolution in the context of microscopy?
What is the resolving power of the unaided human eye?
What is the resolving power of the unaided human eye?
What does the word 'microscope' mean?
What does the word 'microscope' mean?
What is the formula for determining total magnification in a microscope?
What is the formula for determining total magnification in a microscope?
What happens if there is increased magnification without improved resolution in a microscope?
What happens if there is increased magnification without improved resolution in a microscope?
What is the resolving power of the unaided human eye?
What is the resolving power of the unaided human eye?
If the ocular power is 10x and the high power objective is 50x, what is the highest magnification achievable using this microscope?
If the ocular power is 10x and the high power objective is 50x, what is the highest magnification achievable using this microscope?
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Study Notes
Microscope Basics
- The word 'microscope' originates from the Greek words 'mikros' meaning small and 'skopein' meaning to see, literally meaning "to see small things".
- A magnification of '100x' means that the image is enlarged 100 times its original size.
Magnification in a Microscope
- The total magnification in a microscope is determined by multiplying the power of the ocular lens (eyepiece) by the power of the objective lens.
Resolution in Microscopy
- Resolution in the context of microscopy refers to the minimum distance between two points that can still be distinguished as separate.
- The resolving power of the unaided human eye is approximately 200 micrometers (μm).
- The formula for determining total magnification in a microscope is: Total Magnification = Ocular Power x Objective Power.
Limitations of Magnification
- If there is increased magnification without improved resolution in a microscope, it does not provide more detail, but rather a larger, blurrier image.
Calculating Total Magnification
- If the ocular power is 10x and the high power objective is 50x, the highest magnification achievable using this microscope is 10 x 50 = 500x.
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