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Anonymous users2024-02-11Rainbows are caused by the dispersion and reflection of small water droplets in the sky that are nearly round when sunlight hits the sky. When sunlight hits a water droplet, it is incident at different angles at the same time, and it is reflected at different angles within the water droplet. The reflection of 40 to 42 degrees is the most intense, resulting in the rainbow we see.
To cause this reflection, sunlight enters the water droplet, first refracts it once, then reflects off the back of the water droplet, and finally refracts it again when it leaves the droplet. Because water has a dispersive effect on light, the refractive index of light of different wavelengths is different, and the refractive angle of blue light is greater than that of red light. Because the light is reflected inside the water droplet, the observer sees the spectrum upside down, with red light at the top and other colors at the bottom.
In fact, as long as there are water droplets in the air and the sunlight is shining at a low angle behind the observer, it is possible to produce a rainbow phenomenon that can be observed. Rainbows are most common in the afternoon, when the weather clears after the rain. At this time, the air is less dusty and full of small water droplets, and one side of the sky is darker because there are still rain clouds.
The rainbow will be easier to see if the sun is visible without clouds above or behind the observer's head. Another place where rainbows are often seen is near waterfalls. Splashing water or spraying water mist in the air with your back to the sun on a sunny day can also artificially create a rainbow.
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Anonymous users2024-02-10Summary. Dear, the rainbow is like an arched bridge, there are seven colors of red, orange, yellow, green, blue, purple, the rainbow can make people appreciate the beautiful spectacle, bring people a pleasant mood, after the rainbow appears, the sky becomes clearer.
What does a rainbow look like, the colors of a rainbow, what can a rainbow do? Changes after the rainbow appears.
Dear, the rainbow is like an arched bridge, there are seven colors of red, orange, yellow, green, blue, purple, rainbow can be appreciated by people, liquid limb silver brings people a pleasant mood, after the rainbow appears, the sky becomes clearer and hungrier.
Hurry up. Pro, the appearance of the rainbow, the color of the rainbow, the role of the rainbow, the changes after the rainbow appears, the above paragraph has written you yo <>
I'm a little news anchor, and I will record small news in one or two sentences.
Dear, Xinyun recorded a small news in one or two sentences: On April 6, the lead beam was sliding, and the China Youth Network reported that the Civil Aviation Road had a deep reflection on the "3.21" China Eastern Airlines MU5735 aircraft flight accident.
Do you like rainbows? Why.
Dear, correct a wrong typo: On April 6, China Youth Network reported that the Civil Aviation Administration of China had a deep reflection on the "3.21" China Eastern Airlines MU5735 flight accident with a Shenkong aircraft.
I love rainbows because they are very beautiful, and I heard that making a wish on a rainbow can make your dreams come true.
Five fresh words about family.
Two good verses about family.
Pro, five fresh words about family: amiable, smart and lovely, considerate, generous, hardworking and brave.
Dear, two good poems about the family: 1. Whoever says an inch is careless, and he will be rewarded with three springs. 2. The line in the mother's hand, and the wanderer's shirt.
Zongzi is written with the example of a green bamboo leaf wrap, how to write.
Dear, the zongzi is wrapped in green bamboo leaves, imitation: moon cakes are packaged in exquisite cartons.
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Anonymous users2024-02-09A rainbow is an optical phenomenon in meteorology.
Since the light is reflected in the water droplets, the spectrum seen by the observer is reversed, with the red light above the maximum and the other colors below. As a result, rainbows and neon are not the same heights, and the order of color cascades is reversed. A rainbow means that light is refracted twice and reflected once, while neon is light that is refracted twice and reflected twice.
Rainbow
Rainbow is the refraction, splitting, internal reflection, refraction and other atmospheric light caused by the light rays shining on the water droplets at a certain angle, after the light hits the raindrops, the refraction will occur in the raindrops, and the light of various colors deviates, among which the refraction of purple light is the largest, the refraction of red light is the smallest, and the other colors of light are in between.
Refracted light is reflected by the trailing edge of the raindrops, and then refracted into our eyes through the raindrops and the atmosphere, because there are many raindrops suspended in the air, so when we look up at the sky, the raindrops on the same arc reflect the same angle of light of different colors, so we see the color of the inner ultraviolet red to the vertical color of the light band, that is, the rainbow. Rainbows mostly appear in the opposite direction of the sun.
The above content reference:Encyclopedia – Rainbow
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Anonymous users2024-02-08The rainbow, also known as the rainbow and simply known as the "rainbow", is an optical phenomenon in meteorology. When sunlight hits water droplets in the air, the light rays are refracted and reflected, forming an arched multicolored spectrum across the sky, which is common after rain. The shape is curved, usually semicircular.
Brilliant colors. The most common terms for the seven colors of light in East Asia and China are ranked from largest to smallest wavelength: red, orange, yellow, green, blue, indigo, and violet.
A rainbow is an optical phenomenon in meteorology. When sunlight hits raindrops in mid-air, the rays are refracted and reflected, forming an arched spectrum of colors across the sky.
The rainbow is a natural phenomenon caused by the reflection and refraction of light from the sunlight into the water droplets in the air.
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Anonymous users2024-02-07Natural light can be decomposed into seven monochromatic lights through a prism, and the monochromatic light after white light decomposition is seven colors from top to bottom: red, orange, yellow, green, blue, indigo, and violet.
When light of different colors hits the prism at the same angle of incidence, the red light is least deflected, it is at the end of the spectrum near the top angle, the frequency of violet light is large, the refractive index in the medium is large, and it is arranged at the end closest to the bottom of the prism in the spectrum.
Therefore: 1. The frequency of red light to violet light is from small to large.
2. The wavelength of red light to violet light is from large to small.
3. The refractive index of red light to violet light is small to large.
Light waves have a certain frequency, the color of light is determined by the frequency of light waves, in the visible light He Wei area, the frequency of red light is the smallest, the frequency of violet light is the largest, therefore, red light to violet light, the frequency from small to large;
The refractive index of the medium is small for red light and large for violet light. When different colors of light hit the prism at the same angle of incidence, the red light is least deflected and is at the end of the spectrum near the apex. The frequency of violet light is large, the refractive index in the medium is large, and it is arranged at the end closest to the bottom of the prism in the spectrum;
Therefore, from red light to violet light, the refractive index goes from small to large;
The relationship between the wavelength and frequency of light is: = where is the propagation speed of light, the unit is m s, the propagation speed of red light and violet light is the same, is the frequency of light, the unit is hertz, is the wavelength of light, and the unit is meters;
From this equation, it can be seen that when the propagation speed of light is the same, the smaller the frequency, the longer the wavelength of light, and the frequency of red light to violet light is from small to large, so the wavelength is from large to small.
Natural light can be decomposed into seven monochromatic lights through a prism, and the monochromatic light after white light decomposition is seven colors from top to bottom: red, orange, yellow, green, blue, indigo, and violet.
The monochromatic light after the decomposition of white light is "red, orange, yellow, green, blue, indigo, and purple" from top to bottom, and its incident angle and refraction angle change.
The rainbow in the sky, the phenomenon of the decomposition of light in nature.
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Anonymous users2024-02-06It is a phenomenon of refraction of light. Rainbows appear after rain and are formed by the refraction of sunlight by water mist remaining in the air. It's a very beautiful physical phenomenon.
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Anonymous users2024-02-05A rainbow.
If you use one, it is, a rainbow bridge.
Rainbow is an optical phenomenon in which sunlight is refracted and reflected when it hits water droplets in the air, forming an arched multicolored spectrum across the sky, which is generally common after rain. We see the rainbow as an arch from the ground, but in fact it is a complete ring, why is that? The basic conditions for the formation of rainbows are water vapor and sunlight.
After rain, the humidity of the air is high, and the water vapor in the air can be seen as countless small water droplets. The small droplet is basically spherical in the air, and no matter how it rolls over and over, its shape remains the same in space. When sunlight hits a small water droplet, two refractions and one reflection occur, i.e., there is no pure "refraction-reflection-refraction" phenomenon.
Different parts of the sunlight hitting the small droplets will have different refraction and reflection paths. However, the light from different angles does not diverge arbitrarily, but seems to be concentrated around a certain angle, which is about 42 degrees. Although the prism breaks down the sun's rays, each color is only refracted to a fixed angle.
Due to the fact that there are many water molecules in the air after rain, sunlight is refracted in the sky.
Just to wait for you to appear, I usually write this sentence for the person in my heart, such as having love in my heart, belonging to it, or only thinking of one person in my heart, I will have this kind of thought and this kind of thought. After all, everyone has someone they like.
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Paper appeared in the Western Han Dynasty, the paper of the Western Han Dynasty was very dry and was not widely used, and the papermaking technology was gradually promoted after being improved by Cai Lun of the Eastern Han Dynasty.