Is everything you see in the telescope magnified image? Why?

You need to be exposed to specific issues in high school, and here is a brief introduction.

Common telescopes can be divided into Kepler telescopes, Galilean telescopes, and reflecting telescopes. The telescope mentioned in the textbook is the Kepler telescope. Both the objective and eyepiece of the Kepler telescope are convex lenses.

The focal length of the objective lens is larger, the focal length of the eyepiece is smaller, the front focus of the eyepiece and the back focus of the objective lens coincide, and the distant object is formed into an inverted and reduced real image by the objective lens, which is located outside the rear focus of the objective lens (very close to the focal point), and then magnified by the eyepiece. The magnification here means that the final virtual image is larger than the real image made by the objective lens, not that the virtual image is larger than the original, in fact, the final image of the telescope is smaller than the original, but the distant object is moved closer and the angle of view is increased.

Most of the binoculars used in family life are Kepler's telescopes, but two total reflecting prisms are placed between the objective lens and the eyepiece, and the image of the objective lens is turned upside down, so that the image seen from the eyepiece is upright.

Should be! Because of the principle of telescopes?

Expert: Netizen insight: How does the telescope move the distant scene to our eyes?

This relies on the two lenses that make up the telescope. In front of the telescope there is a convex lens with a large diameter and a long focal length, called an objective lens; The lens at the back has a small diameter and a short focal length, which is called an eyepiece. The objective lens gathers the light from the distant scene behind it into an inverted and reduced real image, which is equivalent to moving the distant scene closer to the imaging place at once.

And the inverted image of this scene falls exactly in front of the eyepiece, so that looking at the eyepiece is like looking at something with a magnifying glass, and you can see a virtual image magnified many times. In this way, a far, far away scene will appear as if it is close to you in front of you in the telescope.

Telescopes, like other optical instruments, have developed telescopes of various structures one after another after a long history. According to the principle of optics, it can be summarized into two categories: refractive and reflective. Refractive telescopes, common prism binoculars, because of their short mirrors, large field of view, easy to carry, often used in military and field investigations; Reflecting telescopes are made of concave mirrors and convex lenses as eyepieces, which are used by observatories to observe celestial bodies.

At present, the aperture of the largest mirror has reached 6 meters, and the entire telescope is as tall as a dozen story buildings! The light it "captures" is 10 million times more powerful than the light that naturally enters the human eye; Observing celestial bodies at distances of up to 10 billion light-years (a light-year distance is equivalent to about 9,460.8 billion kilometers), the number of stars that can be seen is billions of dollars!

If you use it upside down, you will see a shrunken image.

Not necessarily, but what you see when you use it upside down is a shrunken image. The principle on the first floor has already been said, so I won't say more.

Seeing far and seeing clearly is the goal pursued by all telescopes, the far to see must be a large multiple, to see clearly is to have a large diameter of the objective lens, the longer the single to see the farther and thicker the clearer to see.

A telescope with a large aperture, a transparent lens, a transparent coating, and a non-reflective lens.

This question should be addressed separately.

1. The objective lens of the telescope is equivalent to a spring dismantling camera, and the eyepiece of the telescope is equivalent to a magnifying glass. The inverted and reduced real image made by the object round sensitive lens falls within one time of the focal length of the eyepiece, and then forms an upright magnified virtual image.

2. The objective lens of the microscope is equivalent to a projector, and the eyepiece of the microscope is equivalent to a magnifying glass. The inverted magnified real image of the objective falls within one time of the focal length of the eyepiece, and then forms an upright magnified virtual image. Therefore, the objective lens and eyepiece of the microscope are magnified twice to be able to see relatively small objects.

Question 1: What is the final image of the telescope The objective lens is a convex lens with a long focal length, which becomes an inverted and reduced real image.

The eyepiece is a convex lens with a short focal length, which is an upright magnified virtual image.

Question 2: What is the image of the eye through the telescope and microscope [Synchronous Education Information] 1. This week's teaching content:

Eyes and glasses, microscopes and telescopes (1) Understand the structure of the eye and how it sees objects. (2) Understand how glasses correct vision. (3) Understand the basic structure of microscopes and telescopes.

Two. Key points and difficulties: (1) Key points:

the role of the eye and its imaging characteristics; Characteristics and correction of myopia and hyperopia. The structure of a telescope and a microscope. Both telescopes and microscopes have the main structure of an objective lens and an eyepiece, and they differ in their imaging principles.

2) Difficulty: The causes and correction methods of myopia and hyperopia are compared in the following table. Easy to mix point:

It is easy to confuse the causes of myopia and farsightedness, and it is difficult to distinguish what glasses should be worn to correct it. imaging principles of telescopes and microscopes; The Kepler telescope consists of two sets of convex lenses. The objective lens acts like a camera, making distant objects appear as an inverted, zoomed out image near the focal point.

The eyepiece acts as a magnifying glass, so we see an upside-down, shrunken virtual image.

Question 3: Why does it look like it is upright with a telescope Yes, your question is right, and you can ask this question to show that you have learned this knowledge point. Added:

Unfortunately, the introduction given in the textbook is incomplete. The textbook only tells the analysis of the orthodox inverted image, but does not say why most of the telescopes used by human beings are orthodox Alas, it is because there is a prism in it. ytwscc...G, hehe, you get it, right?