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Spectrometer
An instrument that measures the intensity of electromagnetic radiation over a range of wavelengths. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...
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Emission
The release of electromagnetic radiation, often in the form of light, from an atom or molecule. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...
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Radiation
Though often used more narrowly to refer to ionising radiation, the term radiation refers to any form of energy that travels through a medium, radiating outwards from a source. A Twig Science Glossary Film. Key scientific terms defined...
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Electromagnetic spectrum
The complete range of wavelengths, considered as a continuum, of all kinds of electromagnetic radiation. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
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Infrared light
Electromagnetic radiation with a slightly longer wavelength than visible light, between about 700 and 1050 nanometres. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
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Electromagnetic radiation
A wave with both magnetic and electrical field components, which oscillate perpendicular to each other. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
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Hertz (Hz)
The SI unit of frequency, one hertz is equal to one cycle per second. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
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Ultraviolet light
Electromagnetic radiation in the region of the spectrum between visible light and x-rays, about ten to 400 nanometres in wavelength. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
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Radioactive Substances
What is radioactivity? Explore the difference between alpha, beta and gamma radiation and how their different properties can make them useful. Physics - Energy And Radioactivity - Learning Points. Radioactivity is the nuclear decay of...
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The Electromagnetic Spectrum
The range of electromagnetic radiation in the electromagnetic spectrum is huge. Where does this radiation come from and how do the frequencies and wavelengths vary? Physics - Waves - Learning Points. Electromagnetic radiation is all...
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What Makes Up the Electromagnetic Spectrum?
From radio waves to gamma rays, the electromagnetic spectrum is useful in different ways. How does this radiation differ and how can they be used? Physics - Waves - Learning Points. Electromagnetic radiation exists along a continuous...
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Heat Absorption
We use two cans, one painted black and the other painted white, to investigate heat absorption. The containers are placed in front of a heat source and the temperature change is recorded. This shows that the black container absorbs heat...
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Radio waves
The lowest frequency range of electromagnetic radiation, with wavelengths from millimetres to many kilometres. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Gamma ray
High energy electromagnetic radiation, with extremely short wavelengths, often smaller than an atom. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
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X-ray
Electromagnetic radiation present between ultraviolet and gamma rays on the electromagnetic spectrum, with wavelengths from about 0.01 to 10 nanometres. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using...
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Wave Nature of Light: What is Light?
By the end of this learning object, the student will be able to: Recognize the spectrum colors.86731
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How Do Radio Stations Transmit The Name Of The Song That’s Currently Playing?
The song name is displayed on the radio with the help of a specific communications protocol called the Radio Data System, which embeds small bits of information in FM broadcast signals. RDS allows broadcasters to send much more than just...
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Can Switching Off WiFi and Mobile Data Protect You From Radiation?
Simply switching off your phone data won’t completely eliminate radio wave emissions, even when your phone is on standby mode. This is because the phone needs to be connected to a nearby cell tower to be online and available for calls...
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GCSE Physics - How Radiation Affects Temperature #72
This video covers: - The idea that objects can absorb and emit energy in the form of radiation, and that this can affect their temperature - What determines which type of radiation is emitted - Wavelength-intensity graphs - How these...
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GCSE Physics - Atomic Structure, Isotopes & Electrons Shells #32
This video covers: - The structure of the atom - The difference between protons, neutrons and electrons - What isotopes are - Energy levels - Ionisation General info: - Suitable for all GCSE and IGCSE courses - Suitable for higher and...
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Different Types of Energy
Dr. Forrester describes the different types of energy, including potential, kinetic, mechanical, and chemical energy as well energy created by light, sound, and heat.
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What is Blackbody Radiation: Explained in Simple Terms
A black body is a theoretical or imaginary object that perfectly absorbs all incoming electromagnetic radiation, and also emits radiation, like heat and visible light, based on its temperature. A black body is considered theoretical...
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The Electromagnetic Radiation Spectrum
This video will explain the electromagnetic radiation spectrum, what it is, and how it can be used to observe space objects.