1. Refractive index and refractive index
Light propagates in a straight line between two points in a homogeneous isotropic medium. When passing through transparent objects with different densities of media, refraction occurs because the propagation speed of different media is different. When light that is not perpendicular to the transparent surface is incident from air onto transparent objects such as glass, the direction of the light changes in the middle plane, forming a normal and a refractive angle.
2. Lens performance
Lenses are the most basic optical components that make up the optical system of microscopes, and components such as objective lenses, eyepieces, and focusing lenses are all composed of a single or multiple lenses. According to its appearance, it can be roughly divided into two types: convex lens (positive lens) and concave lens (negative lens).
Using a microscope
1. The observed object image is opposite to the actual image. Note that the movement direction of the slider is opposite to the movement direction of the object in the field of view.
2. Magnification factor=objective lens factor * eyepiece factor.
3. A biological specimen observed under a microscope is thin and transparent, and can only be observed clearly when light passes through. Therefore, it is necessary to process glass specimens.
