In the second year of junior high school, the magnifying glass is the magic horse will see the real

Do you mean to say: you (the eye) and the object are on opposite sides of the lens, but you see an inverted image of that object (whether magnified or zoomed out), like looking at a tree in the distance?

When looking at a real image, people and objects are not necessarily on the same side of the lens. When we observe the real image in the laboratory, the person and object (usually the candle) are on the same side of the lens, because we use the light screen to take over the real image, and then the person looks at the light screen. In fact, whether there is a light screen or not, that real image always exists.

If the human eye and the object are on the opposite side of the lens, the object can still form a real image through the lens, but we do not use the light screen to undertake it. But the image still exists, because the reality is the actual convergence of light, and the image is equivalent to an entity, an object that we usually call it.

Thus, of course, the human eye can see it, just as it can see any object that actually exists.

When you use your eyes to be in the position of the actual image, your eyes are equivalent to a light screen and can receive the corresponding real image.

If your eyes are not in the position of the real image, your eyes are seeing a bright light, and it is not an image.

When a convex lens is a virtual image, the eye can see an upright virtual image through the lens at any position on the other side.

But in order to see the real image on the other side, you have to adjust the position of the eye, and when the eye is in the position of the real image, you can see the image clearly. Otherwise, it's a piece of light. Not like.

First of all, what the magnifying glass sees is an upright image, so it must be an imaginary image (the reality must be inverted).

The so-called "if you see a virtual image against the light path, you have to look through a convex lens on the opposite side of the object" means that because it is a virtual image, it cannot be directly imaged on the retina, so you must see it through a lens.

Got it?

The convex lens can concentrate the light, and when the object distance is greater than 2 times the focal length, it becomes an inverted and reduced real image. When the object distance is equal to the focal length, it becomes an inverted real image, when the object distance is less than 2 times the focal length and greater than 1 times the focal length, it becomes an inverted real image, and when the object distance is less than 1 times the focal length, it becomes an upright magnified virtual image.

This is related to the focal length, when the object is between the focal length and the convex lens, it is reduced, it happens to be equal in the focal length, and there is another one that is magnified, so I hope you can be satisfied, the opposite side of the object is still on the same side of the object through the convex lens. See for yourself.

It's a magnifying glass, and when you look closer, it's like it. Concave lenses are myopia lenses.!

Legendary aperture imaging.

Magnifying glass. Imaging is a virtual image, if the image is inverted, it is a real image; Generally speaking, if you look close with a magnifying glass at a distance of less than 1 focal length, it is a virtual image. A magnifying glass is a simple visual optical device used to observe the tiny details of an object, and is a converging lens with a focal length much smaller than the photopic distance of the eye.

Objects in the human eye digging tung disadvantage omentum.

is proportional to the size of the image.

The horns of the object to the eye.

1.If the object distance is outside 2x the focal length, the real image, the image is on the other side, the image distance is between 1 and 2x the focal length, zoom out, and stand upside down.

2.If the object distance is equal to 2x the focal length, the real image, the image is on the other side, the image distance is equal to 2x the focal length, equal size, inverted.

3.If the object distance is between 1 and 2x the focal length of the wheel, the real term, the image is on the other side, the image distance is outside the 2x focal length, magnified, inverted.

4.If the object distance is equal to 1 times the focal length, no imaging is performed, and the refracted light judgment lines are parallel.

5.If the object distance is within 1x the focal length, the virtual image, the image is on the same side, the image distance is greater than 2x the focal length, magnified, upright.

1.It is used for the elderly to read some small print on books.

2.It is used for some archaeologists to observe when studying artifacts.

3.Application of projectors.

It's a convex lens. Because the convex lens has the effect of converging light, but only when the object to be observed is within one time of the focal length of the convex lens, the upright magnified image will be seen. If the landlord is interested, he can go here to see the principle of the convex lens and under what circumstances can he see the magnified image.

The characteristic is that this magnified image is like a virtual image, which cannot be imaged on the screen.

And make sure that the object you want to magnify is within the focal length of the magnifying glass.

The magnification of the magnifying glass is related to its curvature, according to our conventional understanding, the more drummed the better, the flatter and smaller.

The object distance l is v apart

l>2f f2f inverted zoomed in real image l=f does not image 02f inverted zoomed in real), obviously, is inverted. So don't think that magnifying glasses are only magnifying. For the problem of virtual reality, the eyes can see it, and at the same time, the light screen can receive it, which is the real image; The eye can see it, but the light screen can't receive it, it's a virtual image.

In essence, the image formed by the convergence of actual light rays is a real image, and vice versa.

Take the distance, that is, the object distance is greater than the focal length, and it becomes an inverted real image, and the three situations outside the focus of the above picture are, you see.

1783studio's answer and image are very good, your few follow-up questions he answered similarly, you said that the convex lens is very clear when changing at a long enough distance, this is because when the object distance is greater than or equal to 10 times the focal length, the image distance is about equal to the focal length, that is to say, the image distance basically does not change much, which is also the imaging method of point-and-shoot cameras.

It is formed by the convergence of actual rays of light, not by the reverse extension of rays, so it is a real image.

When you look at a distant object with a distance greater than twice the focal length, you can see the real image of an inverted persona, and after the adjustment of the eye, you can see a clear image, if the eye is very close to the magnifying glass, what you see is an upright image, but it is a blurry image.

The eye can see, and the light screen can receive the real image; The eye can see that what the light screen cannot receive is a virtual image.

Analysis: The knowledge points examined in this question are the imaging characteristics of the microscope and magnifying glass The imaging characteristics of the microscope: What you can see from the eyepiece is the virtual image of the magnifying glass that is upside down and left and right The imaging characteristics of the magnifying glass:

When the object distance is within one double the focal length, the rotten auspicious gently convex lens becomes a magnified and upright virtual image Therefore, the selection: b Comments: The key to this question is to clarify the imaging characteristics of the microscope and magnifying glass

Send you a picture of an upright enlarged virtual image, and you can see it for yourself!

2. The lens has a convergence effect on the sun, and the temperature at the focal point is very high, which can ignite the paper.

I hope it will be helpful to you, and I wish you progress in your studies!