how is the magnifying power of a microscope determined?
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how is the magnifying power of a microscope determined?
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Answer:
By multiplying the magnifying powers of the objective lens and the eyepiece (so 10 x 40 = total magnification of 400x).
To determine the magnifying power of a simple microscope, you must calculate the optical magnification.
Explanation:
The magnification (M) of a single lens is
where f is the focal length and d is the distance from the lens to the object. However, if you do not know the magnification, you probably do not know the focal length. This can be easily measured with a simple microscope by using it to form an image of a distant light source on some surface. The lens is moved until a sharp image is formed on the screen. The focal length (f) is the distance from the lens to the image.
OR
The eyepiece lens usually magnifies 10x, and a typical objective lens magnifies 40x. ... You can calculate the total magnifying power of the microscope by multiplying the magnifying powers of the objective lens and the eyepiece (so 10 x 40 = total magnification of 400x).