This is the 160th experiment we explored together
In 1608, a Dutch spectacle merchant saw two children fiddling with lenses in front of the shop, observing the wind vane on the church in the distance. He picked up two lenses and looked at them, and found that the wind vane in the distance was magnified a lot.
After many experiments, he invented the telescope and applied for a patent.
The world’s first telescope was born, and he dedicated this invention to the government, and with the help of the telescope, the Dutch navy could see the enemy earlier, who defeated the mighty Spanish fleet. Telescopes began to become popular in the field of military navigation and became a must-have item for pirates in the old times.
A year later, Italian scientist Galileo Galilei heard the news and used a concave lens and a convex lens to build a high-power telescope.
He used this telescope to look up at the starry sky, observe the shape of the moon, and discover the 4 moons of Jupiter and the movement of sunspots.
At about the same time, German astronomer Kepler was also studying telescopes, proposing the idea of forming a telescope with two convex lenses.
However, Kepler’s hands-on ability is not as strong as Galileo, and he can’t do it himself. Later, Shaina made this telescope according to Kepler’s design, and added a convex lens according to Kepler’s suggestion, so that the scene observed by the eyepiece became a positive image.
We know that sunlight is composed of many different types of light, causing it to diverge into different colors of light after refraction. This can also occur with telescopes after multiple lens refractions, resulting in imaging with color edges, which greatly affect the observation, called chromatic aberration.
Newton invented the reflecting telescope in 1668, using only a concave mirror to concentrate light reflection onto a plane mirror, which is reflected into the eyepiece through the plane mirror, so that the light is not refracted and will greatly eliminate the effect of chromatic aberration. Newton also entered the Royal Society of Science for this invention.
This morning, Dad took everyone together to use the pirate telescope used by pirates hundreds of years ago
—Pirate Telescope—
Pirate telescope 1 unit
Step 1
Hold the top of the telescope in one hand
The other hand is stretched back
Then rotate the telescope to fix
Stretch again
Rotate fixed
The Corsair Telescope has two extensions
Step two
How to put away the telescope
Reverse rotation of the telescope
to unpin
Put the telescope away
Monoculars
It is a visual optical instrument used to observe distant objects
It can magnify the small opening angle in the distance at a certain magnification
Objects that would otherwise be indistinguishable with the eyes are allowed
It becomes clearly visible
It is mainly observed by the refractive magnification of the lens
The earliest telescopes were monoculars
Discovered in the 17th century by the Dutch Hans
So people also call it the “Dutch column”
After several generations of development,
Telescopes have developed a wide variety of forms
There is the Hubble telescope that revolves around the Earth in space
There is also a huge eye of heaven located in the south of our country
There are also military telescopes that play different roles in each branch of the military
Of course, there are handheld telescopes that we have at hand to observe the distance
Tell your friends about this experiment
With them
Share your knowledge
The next issue of Happy Dad will bring
Morse Code
If you want to know how, follow us!
Science is not only about what you learn in books, but also about the joy of hands-on!
Click the image below to purchase the same experimental material:
#pgc-card .pgc-card-href { text-decoration: none; outline: none; display: block; width: 100%; height: 100%; } #pgc-card .pgc-card-href:hover { text-decoration: none; } /*pc style*/ .pgc-card { box-sizing: border-box; height: 164px; border: 1px solid #e8e8e8; position: relative; padding: 20px 94px 12px 180px; overflow: hidden; } .pgc-card::after { content: ” “; display: block; border-left: 1px solid #e8e8e8; height: 120px; position: absolute; right: 76px; top: 20px; } .pgc-cover { position: absolute; width: 162px; height: 162px; top: 0; left: 0; background-size: cover; } .pgc-content { overflow: hidden; position: relative; top: 50%; -webkit-transform: translateY(-50%); transform: translateY(-50%); } .pgc-content-title { font-size: 18px; color: #222; line-height: 1; font-weight: bold; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; } .pgc-content-desc { font-size: 14px; color: #444; overflow: hidden; text-overflow: ellipsis; padding-top: 9px; overflow: hidden; line-height: 1.2em; display: -webkit-inline-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; } .pgc-content-price { font-size: 22px; color: #f85959; padding-top: 18px; line-height: 1em; } .pgc-card-buy { width: 75px; position: absolute; right: 0; top: 50px; color: #406599; font-size: 14px; text-align: center; } .pgc-buy-text { padding-top: 10px; } .pgc-icon-buy { height: 23px; width: 20px; display: inline-block; background: url(https://lf6-cdn-tos.bytescm.com/obj/cdn-static-resource/pgc/v2/pgc_tpl/static/image/commodity_buy_f2b4d1a.png); }
Corsair telescope The world’s first telescope Monocular toys Learn how telescopes work
￥19
purchase