The second laser was near-infrared and was used capture the escaping electrons in action, firing for four femtosecond at a time (a single femtosecond is only 10 -15 seconds). The first laser was an extremely ultraviolet ray intended to excite the helium enough to relinquish one of its electrons, firing in 100 attosecond pulses (one attosecond is a mere 10 -18 seconds). The researchers directed the camera toward a jet of helium-a relatively simple gas, consisting of atoms that have only two electrons each. To measure the event, the physicist used a piece of equipment called an Attosecond Streak Camera, which consists of two lasers of different light firing in extremely short bursts, writes Stewart Wills at Optics and Photonics News. Now researchers have actually captured the electron emission from helium atoms, measuring the minsiscule amount of time it takes for the electron to be ejected after the photon strike. The photon ejects the electron in a process called photoemission, the basis behind solar energy.
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When a photon, or a particle of light, of a certain energy strikes an electron, it can free the electron from its atom. The photoelectric effect shows that light can act as both a wave and a particle. Albert Einstein described this tricky quirk of light in 1905, later winning the Nobel Prize in Physics for his explanation of this defining concept. The researchers accomplished this feat while studying the so-called photoelectric effect in action. And researchers at the Max Plank Institute in Germany finally measured minute changes within an atom on the zeptosecond scale. This tiny slice of time is a fraction of a second-so small it is equal to a single number one sitting 21 places behind the decimal point, a trillionth of a billionth of a second, reports Rebecca Boyle at New Scientist. Continued abuse of our services will cause your IP address to be blocked indefinitely.Don’t even try to capture a zeptosecond using a run-of-the-mill stopwatch. Please fill out the CAPTCHA below and then click the button to indicate that you agree to these terms. If you wish to be unblocked, you must agree that you will take immediate steps to rectify this issue. If you do not understand what is causing this behavior, please contact us here. If you promise to stop (by clicking the Agree button below), we'll unblock your connection for now, but we will immediately re-block it if we detect additional bad behavior.
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