In 1800, the English astronomer William Herschel placed thermometers in the solar spectrum to measure the temperatures of the different colors. Surprise! Beyond red, where the eye sees nothing, the thermometer kept rising. Herschel had just discovered the first invisible light, infrared.

Prism

Exploration of the matter, lit in different wavelengths. This is done with more and more high-performance instruments, like sources of synchrotron light. SOLEIL, the new French synchrotron source, is capable of emitting all types of light from infrared to X-rays, with exceptional brilliance.

In 1895, the German physician Wilhelm Conrad Röntgen studied an electric current passing through a bulb in which the air was at low-pressure. He realized that the bulb produced rays capable of penetrating boxes, bags, suitcases…even the human body. He named them X-rays: Rays because they occur in straight lines like light, and X because he did not know their nature. Despite this doubt, X-rays were immediately used in medicine for radiography, but remained mysterious because no optical instrument was capable of reflecting them, focusing them, dispersing them, or even diffracting them. It was only in 1912 that the German physician Max von Laue experimentally succeeded in obtaining the diffraction of X-rays with a crystal. They are electromagnetic waves, but with extremely short wavelengths, located beyond the ultraviolet spectrum.

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A gradient, a scale, was still lacking. This situation ceased to be in 1801 as well, when the English doctor Thomas Young interpreted colors as a manifestation of light’s wavelengths. His famous experiment with fringes of interference permitted him to measure the wavelengths in question, which are the size of microns, thousandths of millimeters.

Mad About Science is passionate about bringing the world of science to all young Australians, and making it FUN! Science Inspired toys and STEM products for home and school.

And at the other end? There, the surprise was just as great when, a year later in 1801, the German chemist Johann Ritter exposed a photographic plaque covered with silver chloride to the solar spectrum. He realized that it reacted considerably beyond violet. There is a second invisible light—ultraviolet.

We have a wide range of engaging workshops in all areas of science to align with the Victorian school curriculum. Check out our exciting Physical, Biological, Chemical, Earth & Space Science incursions.

Exploration of the Universe, which contains all wavelengths. Astronomy satellites transmit not an overall image of the sky, but rather a series of images for each wavelength, which allows us to create a very precise map of the cosmos and the different objects it contains: Dust clouds, visible and invisible stars, galaxies, neutron stars, black holes, supernovas, and more.

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C Kuang · 2024 · 6 — We believe our conducting polymer-cellulose papers can find important use for various electrically tunable IR optical devices and applications.

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Light slows slightly as it moves from the air into the Light Crystal Prism, and changes direction (this is called refraction). Conversely light speeds up and bends as it leaves the acrylic prism and re-enters the air. The degree of light bending in and out of the prism depends on its wavelength, or colour. Blue light slows more than red light, thus is bent more. This differential bending causes light to disperse into its component colours and make a rainbow. It takes a bit of patience and adjusting of the crystal to form a rainbow. The conditions (the room brightness and shade of the reflecting wall) have to be just right to form a bright spectrum.

Mad About Science offer a comprehensive range of quality school science workshops and incursions. Servicing primary schools and early learning centres in Melbourne and surrounds.

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What is light? What is its nature? Since antiquity, philosophers, mathematicians, astronomers, and physicians have sought a solution to this enigma. For two and a half centuries, a lively controversy existed between partisans of the wave theory, for whom light is a vibration traveling as a wave, against those of the particle theory, for whom light is a stream of particles. Finally, quantum physics, born at the beginning of the 20th century, reconciled the two hypotheses: According to the nature of its interaction with matter, light may be manifested in the form of waves or in the form of particles, the famous photons.

In 1885, the German physician Heinrich Hertz sought to experimentally verify Maxwell’s electromagnetic theory, and to popularize it since it was still poorly understood. He passed a high-tension current through an electric circuit of breakers, two small metal spheres placed a few millimeters apart. The charges accumulated in the circuit until a spark jumped. Hertz observed that another spark jumped simultaneously, several meters away, in an antenna in the shape of a loop. Energy had been transmitted from one circuit to the other, without the aid of a conductor wire. What had transported it? Hertz had the answer: It was an electromagnetic wave, a wave that has the same properties as light: Reflection, refraction, and a speed of 300,000 km per second. He measured the length of the wave by moving the antenna: Around one meter. Thus the spectrum was added to with Hertzian waves, later called “radio waves”, when the first radio sets appeared.

Learn about the history of the discovery of different electromagnetic spectra, which have become tools for the exploration of matter and the universe as a whole.

Illumination is the result of that light on surfaces on which it falls. Thus the illumination makes the surface look more or less bright with a certain colour.

Science workshops that are based on a developmental approach that is uniquely suited to pre-school aged children.  This is an action packed workshop full of science fun.

The Beamo™ MagSafe white ring light works best with iPhones with MagSafe but is also compatible with legacy iPhones, iPads, Android devices as well as laptops ...

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Only Basler cameras that are compatible with the GigE Vision interface standard are supported. The Basler ace 2 camera was tested as part of this capability.

The Light Crystal Prism in an attractive transparent box. A 60 degree acrylic prism, 6.4cm. Instructions included. Made in the US.

The electromagnetic spectrum was now nearly complete, but there was still a hazy border between radio waves and infrared. This would be cleared up during the 1940s with the identification of microwaves. During the Second World War, the English developed radar to detect German bombers at long distances. Radar functions on the principle of the reflection of electromagnetic waves, with the wavelengths ranging from 30 meters to 10 centimeters—from radio waves to microwaves. During the 1950s, American engineers realized that microwave radar heated objects located close by. That is how a military device gave rise to a cooking method that is very common today.

Prismatic effects have fascinated mankind since the beginning of time. Now you have the power to create these mysterious effects with this high quality prism. With a bit of patience your Light Crystal will split a beam of light into a multi-coloured rainbow... reflect an image in weird and wonderful patterns (without the use of mirrors)... and more. This 6.4cm prism is made from sturdy acrylic so it is safe for children to use without fear of breakages if dropped. Age: 8+

Thanks to light, all types of light, today we can see more clearly than ever. We see better, farther, more closely. We are progressively gaining understanding of the world around us.

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Looking for a science themed birthday party?  We provide experienced and high energy presenters for a hassle-free science party.  Sit back and relax while we do the work!

Thus it took almost three centuries to discover the entire range of electromagnetic radiation, in all its types of light and all its sizes. Our eyes can only see an infinitesimal part. We are almost blind. Fortunately, we have invented instruments to make up for our eyes’s lack of sensitivity. Today, the development of ultra-sensitive detectors allows us to capture invisible light, to translate it, and to see its effects. Light has become a marvelous exploration tool.

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Let’s start with Isaac Newton. It is the year 1666. In a room with closed shutters, he works with a small opening to isolate a single ray of sunlight. In the stream of light, he places a glass prism: Via refraction, the light breaks down into a rainbow of colors: Red, orange, yellow, green, blue, indigo, violet. In reality, indigo does not exist in the spectrum, but Newton added it for good measure (at that time, the number 7 was thought to be endowed with magical and mysterious properties).

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Seven colors. Light would remain divided into seven colors for the entire 18th century, called the “century of light”, since philosophers were convinced they were entering a new age illuminated by Reason and Science.

That’s not all; There is a ray with an even shorter wavelength. Its discovery involved 4 people: Henri Becquerel, who discovered radioactivity in 1896; Marie Curie, who isolated radium in 1898; And Paul Villard and Ernest Rutherford, who showed in 1900 that radioactivity has three types: Alpha, beta, and gamma. Rutherford only established the electromagnetic nature of gamma rays in 1914, when he observed their diffraction by crystalline surfaces.

Light and colour properties Light is composed of different wavelengths and colours Rainbow spectrum How light travels in different mediums.

Founded in 1988, Basler has since grown to become a leading developer of industrial machine vision cameras.

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The Maxima 3500 lamp's micro discharge light (MDL) technology produces a steady-state intensity of 90,000 µW/cm² at 6 inches — up to 10 times the UV-A output of ...