The scanning electron microscope (SEM) has the greatest depth of field compared to other objective lenses in optical microscopes. This is because the SEM uses a focused beam of electrons to create an image, allowing for a larger range of depths to be in focus simultaneously.
The objective lens that shows the greatest amount of detail is typically the oil immersion lens, usually a 100x objective. This lens uses a special oil to reduce light refraction, allowing for better resolution and clarity of fine details. Higher magnification objectives, such as 40x or 60x, also provide good detail but not as much as the oil immersion lens. Always start with lower magnifications to locate your specimen before switching to higher magnifications for detailed observation.
scanning objective
Total magnification increases when the objective lens is increased because the objective lens magnifies the image before it reaches the eyepiece lens. The eyepiece then further magnifies the image for viewing.
You can use the coarse adjustment knob with the low-power objective lens because it provides a wider field of view and greater depth of focus, making it easier to bring the specimen into general focus. However, using the coarse adjustment with the high-power objective lens risks crashing the lens into the slide, which can damage both the lens and the specimen. Therefore, fine focusing is necessary at higher magnifications to achieve precise focus without risking damage.
The 'object lens' in a compound microscope is closest to the object being examined.
40x
The lens with the greatest (positive) curvature. The lens with the highest diopter.
The objective lens that shows the greatest amount of detail is typically the oil immersion lens, usually a 100x objective. This lens uses a special oil to reduce light refraction, allowing for better resolution and clarity of fine details. Higher magnification objectives, such as 40x or 60x, also provide good detail but not as much as the oil immersion lens. Always start with lower magnifications to locate your specimen before switching to higher magnifications for detailed observation.
The objective lens with the lowest magnification typically has the greatest field of view. For example, a 4x objective lens will provide a wider field of view compared to higher magnification lenses like 10x or 40x. This is because lower magnification allows more of the specimen to be visible in the microscope's field.
The ocular is the upper lens and objective is the lower lens
The arrow would likely point to the cylinder lens, which is the objective lens of the microscope. This lens is responsible for magnifying the specimen being observed.
low power objective lens
Because during movement of lens there is no slide below objective .
scanning objective
objective lens
The objective lens
The focal length of EyePiece is relatively larger to that of the Objective lens. Power of a lens is inversely proportional to it's focal length. Therefore, Objective is slightly more powerful than EyePiece.