• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
File
File

... only one antinode. That corresponds to half a wavelength: ...
Properties of Light Lab Background
Properties of Light Lab Background

Make it Invisible - GK-12 Program at the University of Houston
Make it Invisible - GK-12 Program at the University of Houston

... The speed of light in different materials is different. So light change direction when it passes from one medium to another at any angle other than 90° or 0°. This is called refraction of light. As the speed of light is reduced in the slower medium, the wavelength is shortened proportionately. The f ...
The Born-Haber Cycle
The Born-Haber Cycle

LT 0742 October 28 Let Your Light Shine
LT 0742 October 28 Let Your Light Shine

Atomic Emission Spectra
Atomic Emission Spectra

Energy Notes
Energy Notes

Worksheet
Worksheet

Slayt 1
Slayt 1

Chemistry EOC Review
Chemistry EOC Review

... 34. How are frequency and wavelength related? 35. Calculate the wavelength of a yellow light by a sodium lamp if the frequency of the radiation is 3.34 x 10 14 Hz. ...
International Year of Light Blog Challenges Faced by Optics
International Year of Light Blog Challenges Faced by Optics

... only affects astronomical observations –the Milky Way is no longer visible in the night sky–, but also birds, insects, sea turtles and other nocturnal creatures, not to mention the tremendous waste of energy involved. The study of light and its technologies has undoubtedly become a key cross-cutting ...
the light
the light

... Flexible endoscope used to obtain information from regions of the body that can not be examined with rigid endoscope , such as the small intestine and much of the large intestine . Flexible endoscope have an opening or channel that permits the physician to take samples of the tissues ( biopsies ) fo ...
or refracted - Purdue Physics
or refracted - Purdue Physics

... Chromatic Dispersion The index of refraction of a medium is usually a function of the wavelength of the light. It is larger at shorter wavelengths. Consequently, a light beam consisting of rays of different wavelength (e.g., sun light) will be refracted at different angles at the interface of two di ...
“EARTH`S ENERGY“
“EARTH`S ENERGY“

to the PDF
to the PDF

... 5. The capacitor has a pair of metal plates which are very close together, with a thin layer of insulation between them. If you connect the capacitor to the generator and spin it round, electrons from one plate are pulled through the generator and piled up on the other plate - the capacitor is charg ...
Franck-Hertz Effect in Mercury
Franck-Hertz Effect in Mercury

... spectrometer, when electron energies are ≥ 4.86 eV. (It would be difficult to observe in air near normal incidence.) (The Hg atom, in its first excited state at 4.667 eV, cannot de-excite by radiation; as discussed above, angular momentum could not be conserved. The 3P0 state is metastable, drifting ...
Potential & Kinetic Energy
Potential & Kinetic Energy

... cannot be created nor destroyed but can change from one form to another • When energy is changed from one form to another, it is called an energy transfornmation • Most forms of energy can be transformed into other forms ...
Document
Document

Document
Document

Raman Spectroscopy
Raman Spectroscopy

... by the substances followed by the emission of the absorbed light. If the absorbed light is emitted instanteniously, the process is called Fluorescence. If the absorbed light is emitted after some time lag, the process is called Phosphorescence. Further, if the energy of the light absorbed is suffici ...
P4.10B Identify common household devices that transform electrical
P4.10B Identify common household devices that transform electrical

Chemistry EOC Review Spring 2013
Chemistry EOC Review Spring 2013

Name: Date: Period: _____ Unit 2 Notes, Part 1 – The Basics of
Name: Date: Period: _____ Unit 2 Notes, Part 1 – The Basics of

... 2. Atoms are the smallest unit of matter. Each different type of atom represents an element (ex: hydrogen, oxygen, carbon). Scientists have created a chart called the periodic table of elements to organize elements by their atomic properties. 3. Four elements—carbon (C), oxygen (O), hydrogen (H), an ...
File
File

Photosynthesis in Bacteria By Emmy Muscan
Photosynthesis in Bacteria By Emmy Muscan

< 1 ... 84 85 86 87 88 89 90 91 92 ... 208 >

Photoelectric effect

The photoelectric effect is the observation that many metals emit electrons when light shines upon them. Electrons emitted in this manner can be called photoelectrons. The phenomenon is commonly studied in electronic physics, as well as in fields of chemistry, such as quantum chemistry or electrochemistry.According to classical electromagnetic theory, this effect can be attributed to the transfer of energy from the light to an electron in the metal. From this perspective, an alteration in either the amplitude or wavelength of light would induce changes in the rate of emission of electrons from the metal. Furthermore, according to this theory, a sufficiently dim light would be expected to show a lag time between the initial shining of its light and the subsequent emission of an electron. However, the experimental results did not correlate with either of the two predictions made by this theory.Instead, as it turns out, electrons are only dislodged by the photoelectric effect if light reaches or exceeds a threshold frequency, below which no electrons can be emitted from the metal regardless of the amplitude and temporal length of exposure of light. To make sense of the fact that light can eject electrons even if its intensity is low, Albert Einstein proposed that a beam of light is not a wave propagating through space, but rather a collection of discrete wave packets (photons), each with energy hf. This shed light on Max Planck's previous discovery of the Planck relation (E = hf) linking energy (E) and frequency (f) as arising from quantization of energy. The factor h is known as the Planck constant.In 1887, Heinrich Hertz discovered that electrodes illuminated with ultraviolet light create electric sparks more easily. In 1905 Albert Einstein published a paper that explained experimental data from the photoelectric effect as being the result of light energy being carried in discrete quantized packets. This discovery led to the quantum revolution. In 1914, Robert Millikan's experiment confirmed Einstein's law on photoelectric effect. Einstein was awarded the Nobel Prize in 1921 for ""his discovery of the law of the photoelectric effect"", and Millikan was awarded the Nobel Prize in 1923 for ""his work on the elementary charge of electricity and on the photoelectric effect"".The photoelectric effect requires photons with energies from a few electronvolts to over 1 MeV in elements with a high atomic number. Study of the photoelectric effect led to important steps in understanding the quantum nature of light and electrons and influenced the formation of the concept of wave–particle duality. Other phenomena where light affects the movement of electric charges include the photoconductive effect (also known as photoconductivity or photoresistivity), the photovoltaic effect, and the photoelectrochemical effect.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report