What shape and size are the eyepieces and objective lenses of a microscope and a telescope?
The objective lens of the microscope forms a magnified and inverted real image, the eyepiece of the microscope forms a magnified and upright virtual image, and the final image of the microscope is a magnified and inverted virtual image; the objective lens of the telescope is an inverted and reduced real image, and the eyepiece of the telescope forms an upright and magnified virtual image, and the final image of the telescope is Magnifies the inverted virtual image.
A telescope is an optical system that keeps the incident parallel light beams parallel to exit through the objective lens and eyepiece. According to the telescope principle, there are three kinds. Instruments that observe electromagnetic radiation from distant objects by collecting electromagnetic waves are called radio telescopes.
In daily life, telescope mainly refers to optical telescope. But in modern astronomy, astronomical telescopes include radio telescopes, infrared telescopes, X-ray and gamma-ray telescopes. The concept of astronomical telescopes has been further extended to the realm of gravitational waves, cosmic rays and dark matter.
Microscope is mainly composed of eyepiece, objective lens, stage and mirror. Both the eyepiece and the objective are convex lenses of different focal lengths. The focal length of the convex lens of the objective lens is smaller than the focal length of the convex lens of the eyepiece. The objective lens is equivalent to the lens of the projector. This object is inverted and magnified by an objective lens. The eyepiece is equivalent to an ordinary magnifying glass, and the real image is made into a virtual image being enlarged through the eyepiece.
The difference between a stereo microscope and a biological microscope can be distinguished from the following points:
1. Imaging effect: The reason why a stereo microscope is called a stereo is because it can observe a three-dimensional sample and form a three-dimensional image; while a biological microscope
The mirror can only observe flat samples. The reason is that the depth of field of a stereomicroscope is much greater than that of a biological microscope.
2. Magnification and resolution: The most conventional stereo microscope objective lens multiple is 0.65X~4.5X, and the better ones are 0.75X~7.5X.
Imported products can reach more than a dozen times, and the stereoscopic vision can be continuously zoomed in; the objective lens of a biological microscope is generally
4X\10X\40X\100X multiples are fixed. The resolution of the biological microscope is much higher under the same magnification, except for special ones.
3. Application fields: Stereo microscopes are widely used in biology, medicine, agriculture, etc.; electronic circuits, microelectronics, chips, etc.;
Metal fittings, heat treatment, etc. Biology is generally only used in biology, medicine, agriculture, etc. Because stereovision can
Observing transparent and translucent samples, creatures can only observe transparent samples.
