Because high power takes up a much smaller area, and you may not be able to find the specimen if it's off to one side. C:
Before switching to high power, the specimen must be in focus and positioned in the center of the field of view under low power magnification. Additionally, the light source should be properly adjusted to provide clear illumination of the specimen at high power.
Because it is too hard to find a specimen on high power. Easier to find them and focus them on low power and then increase the magnification and fine-tune the focus to get a better, closer look.
When viewing a specimen, you must always use the lower power objective lenses first. Low power lens gives the widest field of view and makes it easier to find the specimen when you look through the microscope. Finding the specimen at high power, without first centering it in the field of view at low power, is nearly impossible.
low power objective lens to locate and focus on the specimen before moving to higher magnifications.
low-power because there's more of a field of depth where you can see more rather then in the high power you can't see as much and only one object will be in focus while everything else would be blurry in the background (if there's more then one thing in the slide)
Centering the specimen before switching to high power on a microscope helps ensure that the area you want to observe is in focus and at the center of the field of view. This is important because high power magnification has a narrower field of view and lower depth of field, making it more challenging to locate and focus on the specimen if it is not first centered.
Centering the specimen before switching to high power helps ensure that you are viewing the area of interest in focus. It helps prevent the objective lens from hitting the slide, which can damage both the lens and the specimen. Additionally, centering the specimen can improve the image quality by reducing glare and shadowing.
WHY IS IT IMPORTANT THAT THE IMAGE IS CENTERED IN THE FIELD OF VIEW BEFORE SWITCHING TO A HIGHER POWER
Because when looking at it from far, then you can see more of the specimen, However, when you're looking at it closer up in a high power mode, then you will see less of the object, but much closer.
Centering a specimen on low power ensures that it is within the field of view and makes it easier to locate and focus on at high power. If a specimen is not centered on low power, it may be difficult to find and focus on when switching to high power, leading to potential damage to the specimen or microscope lenses. Additionally, centering the specimen helps to achieve the best image quality and clarity at high magnification.
The high power objective has a shorter focal length and narrower field of view compared to the low power objective. This can cause the specimen to move out of the field of view when switching from low to high power, especially if it was not centered properly. Adjusting the mechanical stage to re-center the specimen or refocusing the microscope may help bring the specimen back into view on high power.
The low power objective lens is usually a 10x lens and it is used to orient the specimen and get it focused before switching to a higher power lens.
Because it is too hard to find a specimen on high power. Easier to find them and focus them on low power and then increase the magnification and fine-tune the focus to get a better, closer look.
After switching from low power to high power, less of the specimen will be visible due to the increased magnification which zooms in on a smaller area of the specimen. This allows for a more detailed view but restricts the field of vision.
Before switching to high power, the specimen must be in focus and positioned in the center of the field of view under low power magnification. Additionally, the light source should be properly adjusted to provide clear illumination of the specimen at high power.
Centering the image on a microscope before switching to a higher power ensures that the object of interest stays in the field of view. This helps maintain focus and prevents the risk of losing sight of the specimen when magnifying it further.
The lens used to locate a specimen on a microscope is typically the lowest magnification lens, known as the scanning lens or low power objective. This lens provides a wide field of view, making it easier to find and center the specimen before switching to higher magnification lenses for detailed viewing.