A microscope has a 20 X ocular (eyepiece) and two objectives of 10 X and 43 X respectively. a) Calculate the low power magnification of this microscope. Show your formula and all work. b) Calculate the high power magnification of this microscope. Show your formula and all work.
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A microscope has a 20 X ocular (eyepiece) and two objectives of 10 X and 43 X respectively :
Low power magnification of this microscope with formula and all work:
- Low power objectives cover a wide field of view and they are useful for examining large specimens or surveying many smaller specimens.
- This objective is useful for aligning the microscope.
- The power for the low objective is 10X. While looking from the side, crank the specimen up as close as it can get to the objective.
- Caluculation : Low power: (10X)(10X) = 100X: high dry: (40X)(10X) = 400X: oil immersion: (100X)(10X) = 1000X.
- Magnification is the process of enlarging the apparent size, not physical size, of something.
- This enlargement is quantified by a calculated number also called "magnification".
- When this number is less than one, it refers to a reduction in size, sometimes called magnification or de-magnification.
High power magnification of this microscope with formula and all work :
- A high-power objective lens magnifies 40x, with total magnification 400x if the eyepiece lens is 10x power, and it is ideal for observing very fine detail, such as nerve cells in the retina or the striations in skeletal muscle.
- The longest objective lens is an oil immersion objective lens, which magnifies 100x.
- Then the field of view of higher power can be calculated based on following formula:
- Low power magnification × Low Power field of view = high power magnification × high power field of view.
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