Why can t I see a clear handstand with a magnifying glass? Rush 10

The magnifying glass is made of a convex lens, and when we use a magnifying glass, the object is often closer to the magnifying glass, that is, less than the focal length of the convex lens, so it becomes an upright and magnified virtual image If the magnifying glass is moved between the object and the light screen, it can be formed into an inverted and reduced real image on the light screen in the appropriate position Because the convex lens has the effect of converging light, it cannot become an inverted and magnified real image

First of all, we should first understand the imaging law of the convex lens (magnifying glass): when shining on the hand, the object is within one double the focal length, and the image is on the same side as the object, forming an upright magnified virtual image; When the object is outside the focal length of 2x, the image and the object are on both sides of the lens, so it becomes an inverted magnified real image.

Virtual image: It cannot be connected with a light screen.

Real image: can be connected with a light screen.

Because the magnifying glass is magnified, but the magnified image can only be inverted. And all upright aspects are virtual images (for convex lenses), so in order to keep you from reading the words upside down, they have to be upright and magnify the virtual images. Ha ha.

Friend, you're not right. Magnifying glasses belong to the category of convex lenses, and their imaging rules are:

The object is inverted and zoomed out at a focal length of 2x;

The object is inverted at 2x focal length, a real image of equal size;

When the object is within 2x the focal length and outside the 1x focal length, it is an inverted magnified real image;

The object is not imaged at a double focal length;

The object is upright, magnified, and virtual within one focal length;

In short, the image law of the convex lens is as follows: 1x focal length is divided into virtual and solid, and 2x focal length is divided into size.

In a clear handstand, the magnified real image is on both sides of the convex lens, and we use the magnifying glass to use the object distance less than 1 times the focal length, and the image and the object are on the same side to form a magnified upright virtual image.

When the object is within 2x the focal length and outside the 1x focal length, it can be inverted to magnify the real image.

At this time, the object distance is less than 1 times the focal length, and the image is on the same side as the object, forming a magnified and upright virtual image.

Because magnifying glasses belong to convex lenses.

According to the imaging principle of convex lenses:

When the object is placed outside the focal point, it becomes an inverted real image on the other side of the convex lens, and there are three types of real images: reduced, large, and magnified. The smaller the object distance, the larger the image distance, and the larger the real image. The object is placed in focus, and the virtual image is magnified upright on the same side of the convex lens.

The larger the object distance, the larger the image distance, and the larger the virtual image. It will not be imaged at the scorching spot. At 2x focal length, it will be an inverted real image.

So when you look at it from a distance with a magnifying glass, it will become an inverted image.

Why not an enlarged image of the potato?

On the right side of the figure is a convex lens.

Because the object distance is about 1 cm, within 1 times the focal length of the convex lens, the convex lens acts as a magnifying glass and disturbs the hand

Therefore, the image is an upright magnified virtual image.

The reason why the lens on the right side is an upright magnified virtual image is because it is a wide concave mirror. The characteristic of concave mirrors is that the light will be focused before a focal point after passing through the mirror, and the inside of the mirror will be bright and rotten, such as producing a magnified virtual image. The inverted magnified reality is the characteristic of a convex mirror, that is, after the light passes through the mirror, it will focus to a focal point, and an enlarged real image will be produced on the outside of the mirror.

Therefore, the images produced by the concave excitation mirror and the convex mirror are opposite.

It's very simple When the balanced light emitted by something far away (infinite) hits the magnifying glass (protruding lens), the light will focus on the Divine Oak and the human eye will look at the side formed by the Shadow Blind Statue, and the image is upside down Shrinking Treasure Statue Why is the real image of the natural handstand shrinking between the large mirror and the human eye.

Every magnifying glass has a focal point. Since the distance to the focal point is multiple, there will be a real and virtual image, and the handstand will be upright.

The description of your empty calendar is wrong, it should be: through a magnifying glass, you can see an upright, magnified virtual image.

The light reflected (or emitted) by the object on the other side of the magnifying glass enters the eye after being deflected by the convex lens, and after these rays reach the retina, they cannot converge on the retina to form an image, but the eye really receives the thorny rubber stimulus of light, and it can converge into an image along the opposite direction of the light next to the dust, and this upright and magnified image is not the image formed by the arrival of real light, therefore, it is a virtual image.

AC, camera, and camera are made by using the object distance greater than twice the focal length of the convex lens, and the object is made into an inverted and reduced real image, not an upright image, so the AC is wrong

B, the projector is more than one time the focal length of the convex lens when the focal length is less than two times the focal length, into an inverted magnified real image and made, so B is correct

d. The magnifying glass is a virtual image of the object magnified when the object distance is less than one time of the focal length of the convex lens, and the object is magnified upright, not a real image, so D is wrong

Therefore, choose B

Magnifier is. Convex.

When the object is outside of 2x the focal length, it is scaled up upside down.

Real. When the object is buried between 1 and 2 times the focal length, it becomes an inverted magnified real image, and its focal length is generally a few centimeters to more than ten centimeters.

Middle School Physics. Knowledge, please click, if you don't know, ask questions.

A magnifying glass.

The finished reality must be inverted. This is determined by the principle of the magnifying glass.

There are three ways to solve this problem:

1. Turn the imaged object upside down;

2. If the negative is used for imaging, the negative is turned upside down for imaging;

3. Add a magnifying glass, but at a relatively long distance to ensure that it becomes an inverted real image first, and then use this image as an object for secondary imaging.

A virtual image made of a single magnifying glass.

It can't be upside down.