What does a photon energy unit of a Joule equal? How was Bohr able to discover the energies of each energy level in the hydrogen atom? How does an atom emit a photon? How is the energy of a photon related to its wavelength?
Is synchrotron light coherent? How is alpha radiation created? Explain how you can create neon. How does a synchrotron particle accelerator work? How was dark matter discovered? How do lenses refract light? How does an atom emit a photon?
Light is a form of energy that can be released by an atom. It's made up of many small particle-like packets that have energy and momentum but no mass. These particles, called photons, are the most basic units of light. Photons are released as a result of moving electrons. In an atom...
An atomic clock is a clock that uses the resonance frequencies of atoms as its resonator. Basically atoms can be seen to resonate or “vibrate” as they absorb or emit energy. The electrons in all elements exist at different energy levels (it can help to conceptualise an atom as a positive...
They're perfect as safety lights because they're portable, cheap and they emit a ghostly glow. Light sticks, as some people call them, are also extremely popular on the rave scene (as are light necklaces, light glasses and light rope). They even make an ideal lamp for SCUBA divers and...
(Check out How Light Bulbs Work to find out why heated objects emit light.) The heat of the flame keeps the fuel at the ignition temperature, so it continues to burn as long as there is fuel and oxygen. As you can see, there are three essential elements involved in this process: ...
Light is a form of energy that can be released by an atom. It is made up of many small particle-like packets that have energy and momentum but no mass. These particles, called light photons, are the most basic units of light. (For more information, see How Light Works.) Atoms release...
Either an object can directly emit light waves in the frequency of the observed color (a neon light does this), or an object can absorb all other frequencies, reflecting back to your eye only the light wave, or combination of light waves, that appears as the observed color (any painted ...
Some types of holograms use lasers that produce different colors of light as well. Depending on the type of laser you're using, you may also need a shutter to control the exposure. Lenses: Holography is often referred to as "lensless photography," but holography does require lenses. However...
What determines the speed of light? Why do light waves bend when entering a different medium? What produces all light energy? How does an atom emit a photon? How are waves reflected? What's the difference between diffraction and scattering of light?