Explain how to calculate total magnification of the microscope
The correct answer and explanation is:
Correct Answer:
To calculate the total magnification of a microscope, multiply the magnification of the objective lens by the magnification of the eyepiece (ocular lens).
Formula:
Total Magnification = Objective Lens Magnification × Eyepiece Lens Magnification
300-Word Explanation:
The total magnification of a microscope tells how much larger an object appears under the microscope compared to its actual size. This magnification is the product of two separate lenses: the objective lens and the eyepiece (also known as the ocular lens). Each of these lenses contributes to enlarging the image viewed by the user.
The objective lens is located near the stage of the microscope and is the first lens that light passes through after it has passed through the specimen. Common objective lenses magnify objects at 4×, 10×, 40×, or 100×, depending on their type.
The eyepiece lens is located at the top of the microscope, where the viewer places their eye. It typically has a fixed magnification, often 10×.
To find the total magnification, simply multiply the magnification power of the objective lens currently in use by the power of the eyepiece. For example, if the objective lens is set to 40× and the eyepiece is 10×, the total magnification is:
40 × 10 = 400
This means the image appears 400 times larger than the object’s actual size.
Understanding total magnification is important for scientific observation, especially in biology and microbiology. It allows the observer to estimate the size and structure of microscopic objects like cells or bacteria. Choosing the right magnification helps ensure clarity and detail while avoiding image distortion or blurriness. Always start with the lowest objective lens (usually 4× or 10×) to locate the specimen, then switch to higher magnifications as needed.