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A femtosecond is a unit of time in the International System of Units (SI) equal to 10 −15 or 1 ⁄ 1 000 000 000 000 000 of a second; that is, one quadrillionth, or one millionth of one billionth, of a second. [1] A femtosecond is to a second, as a second is to approximately 31.69 million years.
An attosecond is to a second, as a second is to approximately 31.69 billion years. [2] The attosecond is a tiny unit but it has various potential applications: it can observe oscillating molecules, the chemical bonds formed by atoms in chemical reactions, and other extremely tiny and extremely fast things.
An order of magnitude of time is usually a decimal prefix or decimal order-of-magnitude quantity together with a base unit of time, like a microsecond or a million years.In some cases, the order of magnitude may be implied (usually 1), like a "second" or "year".
High harmonic generation in krypton.This technology is one of the most used techniques to generate attosecond bursts of light. Attosecond physics, also known as attophysics, or more generally attosecond science, is a branch of physics that deals with light-matter interaction phenomena wherein attosecond (10 −18 s) photon pulses are used to unravel dynamical processes in matter with ...
A worksheet, in the word's original meaning, is a sheet of paper on which one performs work. They come in many forms, most commonly associated with children's school work assignments, tax forms, and accounting or other business environments. Software is increasingly taking over the paper-based worksheet.
Reconstruction of attosecond beating by interference of two-photon transitions, more commonly known as RABBITT or RABBIT for short, is a widely used technique for obtaining the relative phase and amplitude of attosecond pulses. This technique involves the interference of two-photon interband transitions in solids.
The BSRA is a widely used kindergarten readiness test that measures a child's exposure to concepts that support learning at school. It contains five subtests assessing knowledge of colors, letters, numbers/counting, size/comparisons, and shapes. Unlike a questionnaire, the BSRA is structured as a set of tests to be completed with the child.
The Draw-A-Scientist Test (DAST) is an open-ended projective test designed to investigate children's perceptions of the scientist. Originally developed by David Wade Chambers in 1983, the main purpose was to learn at what age the well known stereotypic image of the scientist first appeared.
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