How to do a mirage experiment 20

Traveling in the desert, sometimes I suddenly see an oasis in front of me, but it is very disappointing to run past, and there is not even a trace of it. Actually, it is not a real oasis, but an illusion that the sun's rays reflect in the air from an oasis in the distance. It's called a "mirage."

Let's do an experiment: take a cup, pour half a cup of water, place it in the sun, and insert a chopstick into the cup. This is where you see the chopsticks in the water and the chopsticks on the surface of the water like folds.

This is caused by the refraction of light; When light travels in the same density of air, the speed of light does not change, and it always travels in a straight direction; However, when light enters water obliquely from the air, the density of the water changes, the speed of the light changes, and the direction of the light is tortuous.

A "mirage" that occurs in the desert is a phenomenon in which sunlight meets air of different densities and refracts. In the desert, the sand and gravel are scorched by the sun during the day, and the temperature on the surface of the sand layer rises rapidly.

Due to the poor heat transfer performance of the air, when there is no wind, the vertical air temperature difference over the desert is very significant, the lower is hot and the upper is cold, the upper air density is high, and the lower air density is low. When sunlight moves from a dense layer of air to a layer of air with a low density, the speed of light changes, and the light is refracted to reveal the distant oasis in front of people's eyes.

On the surface of the sea or river, this phenomenon of "mirage" sometimes occurs.

Go to the desert and see!!Hehe, kidding, should you do it in class on two substances with a large temperature difference? You also dare to think funny

Mirage principle: when the air humidity is large, a large area of water vapor in the movement of the inadvertent formation of a huge "lens", when the ground near the shout of the temperature changes drastically, it causes a huge difference in atmospheric density, the scenery of the distant feast in the light propagation occurs abnormal refraction and total reflection, forming a virtual image, this is the mirage.

Mirage, also known as mirage Qingjing, is essentially an optical phenomenon, which is a natural phenomenon formed by the refraction and total reflection of light.

According to the position of the mirage relative to the orientation of the original, it can be divided into upper mirage, lower mirage and side mirage, according to the symmetrical relationship with the original, it can be divided into normal mirage, side mirage, paramirage and reverse mirage, according to the color can be divided into color mirage and non-color mirage and so on.

Mirages have two characteristics: they are repeated in the same place and appear at a relatively repeated time.

The mirage is an anomalous refraction phenomenon that results from the refraction of light rays propagating through layers of atmosphere with different perpendicular densities. It is often divided into upper appearance, lower appearance and lateral appearance mirage.

When light is obliquely transmitted from one medium to another, the direction of propagation cavitation changes so that the light is deflected at the junction of different media.

The refraction of light, like the reflection of light, occurs at the junction of two mediums, except that the reflected light returns to the original medium, while the refracted light enters the remaining beam in the other medium. Since light travels at different speeds in two different substances, the direction of propagation changes at the junction of the two mediums, which is the refraction of light.

Classification of mirages.

There are many types of mirages: according to the position of its appearance relative to the original object, it can be divided into epimirage, inferior mirage and lateral mirage; According to its symmetrical relationship with the original, it can be divided into regular mirage, lateral mirage, paramirage and reverse mirage; According to the color, it can be divided into color mirage and non-color mirage and so on.

A mirage is an anomalous refraction phenomenon that results from the refraction of light rays propagating through layers of the atmosphere with different perpendicular densities. It is often divided into upper appearance, lower appearance and lateral appearance mirage. <>

A mirage is an illusion formed by the refraction of distant objects, and its principle is that the sun causes the ground temperature to rise and form a kind of air temperature gradient, due to the different densities, the refraction of light at the boundary of the air temperature gradient.

Due to the different densities, light rays are refracted at the temperature gradient demarcation. The brain thinks that light always travels in a straight line, but when light passes through the cool, dense atmosphere below, it refracts downward, so that distant buildings appear in the brain are taller than they actually are.

Mirage Formation Conditions:

Mirages are closely related to geographical location, geophysical conditions, and the meteorological characteristics of which places at a given time. The abnormal distribution of air temperature is the meteorological condition for the formation of most mirages.