When aligning a reading microscope, what should you do first?
Reading the light with a microscope is an important step when using a microscope. Some students randomly rotate an objective lens to face the light hole instead of using a low magnification mirror as required. I like to use one hand to turn the mirror, often causing it to be pulled down. So when guiding students, teachers must emphasize the use of low magnification mirrors for light. When the light is strong, small aperture and flat mirrors are used, while when the light is weak, large aperture and concave mirrors are used. Reflective mirrors should be rotated with both hands until a uniform and bright circular field of view is seen. After aligning the light, do not move the microscope casually to prevent the light from accurately entering the through hole through the reflector.
There are circular holes of varying sizes on the top of the shutter, called apertures. By aligning different apertures with the light holes, the intensity of light can be adjusted. The specimen is usually located in the center of the light hole for easy observation.
The meaning of magnification refers to the magnification of the eyepiece multiplied by the magnification of the objective lens. The one closest to the eyes is called an eyepiece. The length of the eyepiece objective lens is not related to the magnification factor. The distance between the objective lens and the glass slide is not related to the magnification factor. The larger the magnification, the smaller the number of cells in the field of view. The magnification is not related to the brightness of the field of view, but to the reflection mirror and shading mirror.
Move the eyepiece, if the dirt moves, the dirt will be in the eyepiece. Move the objective lens, and if the dirt moves, the dirt will be in the objective lens. Move the slide, if the dirt moves, the dirt will be on the slide. Keep the other two still and move the other one to know.
First low magnification mirror, then high magnification mirror.
Unity: All have cell membranes, cytoplasm, ribosomes, and nucleic acids. All cellular organisms have DNA and RNA, and genetic material is DNA.
Differentiation: The essential difference is that prokaryotes do not have a formed nucleus wrapped in a nuclear membrane.
