Why is the sun big in the morning and small at noon?

Because there are clouds on the surface of the earth in the morning, if you look at the sun through the clouds, the sun is bigger. When the clouds dissipate at noon, the sun appears small, but the size of the sun has not changed. It is not correct to describe the distance of the ground from the sun according to different senses.

A child said that the sun is cool in the morning and hot at noon, and it is also incorrect to explain the distance of the sun from the ground from the body's perception of temperature. Because the heat of the sun shining on the ground dissipates at night, it feels cool in the morning; At noon, the heat of the sun hits the ground, so it feels hot. The heat and coolness of this temperature does not indicate how close the sun is to the ground.

Later, scientists finally calculated that the average distance between the Earth and the Sun was 149.6 million kilometers.

We look at a white figure that is larger than a black figure of the same size. This is called "photoosmosis" in physics. When the sun rises, the surrounding sky is dark and dark, so that the sun appears bright, and at noon, the sky is bright, and the difference between the brightness of the sun and the backing is not so great, which is why it seems that the sun is bigger in the morning than at noon.

In short, the sun is at the same distance from us in the morning and at noon, so its size is the same, and it seems that the sun is bigger in the morning than at noon because of the illusion of the eye.

Also, is it because the sun is closer to us at noon than in the morning? Neither is it. So why?

Noon is hotter than morning because the sunlight is directly on the ground at noon, and the morning sunlight is obliquely on the ground. So noon is hotter than morning.

In fact, the heat and coldness of the weather are mainly determined by the temperature of the air. The main factor affecting the air temperature is determined by the intensity of the sun's radiation, but the solar heat is not the main reason for the direct increase in air temperature. Because the heat energy directly absorbed by the air into the sunlight is only a small fraction of the total heat energy of solar radiation, most of which is absorbed by the ground.

The ground absorbs the heat of solar radiation, and then conducts it upwards to the air through heat transfer methods such as radiation and convection, which is the main reason for the increase in temperature.

In short, the fact that the sun is hot at noon and colder in the morning is not because the sun is far or near our earth.

I remember so. It's been a long time, and it seems like it's too long.

This is because the light is scattered by the sun's oblique rays in the morning, so it feels bigger.

The reason is very simple, because the rising sun is close to the ground and has a reference object to contrast, so it appears larger, and when it reaches the zenith, it loses the reference, so it looks small.

It can also be understood that people are far away from the sun in the morning and close at noon. Why"Far from the sun, close to noon"Just look at the globe.

Damn, the 2nd floor is too fake, obviously copied a lot of strings, and said that it was my own type.

ps: Search the content on the 2nd floor on Baidu to know if he is a copy.

The Sun or Sun is a star located at the center of the solar system, almost an ideal star where hot plasma and magnetic fields are intertwinedIt has a diameter of about 1,392,000 kilometers, which is equivalent to 109 times the diameter of the Earth; The mass is about 210-30 kilograms (more than 330 times the diameter of the Earth), which accounts for about the total mass of the solar system. Why is the sun big in the morning and small at noon?

If you look closely at the rising sun and the evening sun, you will find that the morning and evening sun are large and round, and the noon sun is small and numerous. The main reason is that the refraction effect of sunlight is particularly obvious when it enters the earth's atmosphere in the morning and evening, and the direct light at noon has more components, resulting in the sun seen in the morning and evening being higher than in the daytime and higher than the actual at noon. On the other hand, the size of the sun has not changed, but there is something wrong with human vision.

That's how vision is formed. The object is imaged on the retina by the lens (lens) of the human eye, which allows the photoreceptor cells to sense light, and then the optic nerve transmits the information to the cerebral cortex, where the information is processed and processed to form vision. To a certain extent, the original appearance has been changed.

For example, for an object of the same size, black is smaller than white, while blue sky is larger than a building, larger than other objects, and so on. The same is true for looking at the sun, because in the morning, the sun has just risen, the background is dark, and the bright targets on the dark background will appear larger. In addition, the morning sun is red, and people use geology as a reference, so the morning sun looks big and round.

The same is true for the twilight sun to be larger, but the twilight sun is flatter because of the refraction of light. At noon, the sun is high in the sky and there is no other illumination, so it looks even smaller. This phenomenon is also often encountered in daily life.

For example, fat people will feel thin when they wear black or dark clothes; Thin people will look plump when they wear light-colored clothes; And fat people will look fatter when they wear dark clothes. Thin people will be thinner when they wear dark clothes. If you notice this visual feature, it will make your life better.