
The wavelength is the distance between repeating units of a wave pattern. It is commonly designated by the Greek language letter ''lambda'' (λ). In a sine wave, the wavelength is the distance between peaks: The ''x'' axis represents distance, and ''I'' would be some varying quantity (for instance air pressure for a sound wave or strength of the electric field or magnetic field for light), at a given point in time as a function of ''x''. Wavelength ''λ'' has an inverse relationship to frequency ''f'', the number of peaks to pass a point in a given time. The wavelength is equal to the speed of the wave type divided by the frequency of the wave. When dealing with electromagnetic radiation in a vacuum, this speed is the speed of light ''c'', for signals (waves) in air, this is the speed of sound in air. The relationship is given by: : where: :λ = wavelength of a sound wave or electromagnetic wave :''c'' = speed of light in vacuum = 299,792.458 kilometre per second ~ 300 0000 km/s = 300,000,000 m/s or :''c'' = speed of sound in air = 343 m/s at 20 °C (68 °F) :''f'' = frequency of the wave For radio waves this relationship is approximated with the formula: wavelength (in metres) = 300 / frequency (in megahertz). When light waves (and other electromagnetic waves) enter a medium, their wavelength is reduced by a factor equal to the refractive index ''n'' of the medium but the frequency of the wave is unchanged. The wavelength of the wave in the medium, λ' is given by: : where: :λ0 is the vacuum wavelength of the wave Wavelengths of electromagnetic radiation, no matter what medium they are travelling through, are usually quoted in terms of the vacuum wavelength, although this is not always explicitly stated. Louis-Victor de Broglie discovered that all particles with momentum have a wavelength associated with their quantum mechanics wavefunction, called the de Broglie wavelength. == See also == *Waves *frequency *period *amplitude *de Broglie wavelength == External link == *[http://www.sengpielaudio.com/calculator-wavelength.htm Conversion: Wavelength to frequency and vice versa - The calculator] ---- *Wavelength is the title of a 1978 album by Van Morrison. Length Wave mechanics nds:Bülgenläng
How Do You Find Wavelength? == Redirect change == I suggest that de Broglie wavelength redirects to de Broglie hypothesis, not here. It makes more sense, and de Broglie hypothesis has a much better description. Perhaps a rewrite is then needed of that section of this page to reflect that. Any objections?
--User:Blinken 11:45, 27 Apr 2005 (UTC) :I can't believe it redirects here instead of de Broglie hypothesis already. I went ahead and changed it, figuring I should be bold. In light of that, the section in here about the de Broglie wavelength probably does need to be rewritten and shortened a bit. --User:Laurascudder | User talk:Laurascudder 19:36, 27 Apr 2005 (UTC) ::Went ahead and moved it over. --User:Blinken 02:19, 4 May 2005 (UTC) == Lambda = C / f == Would it be worth using the more general formula here, instead of ? Or perhaps mentioning that the formula can be used with other waves by replacing the speed of light with the speed of the individual wave? --User:Defragged 13:23, 13 Jun 2005 (UTC) :Yes -- User:Tim Starling 04:11, Jun 14, 2005 (UTC)
User:Jfdwolff | User_talk:Jfdwolff 06:41, 20 May 2005 (UTC) PS Could you please start contributing content, instead of adding external links? ==Cruise ship== Hi Wavelength, I removed the external link you added to Cruise ship. I don't have a problem with discussing the negative impact of Cruise ships, but it should be done in an NPOV way in the article, not just an external link. -- User:Solipsist 07:51, 6 Jun 2005 (UTC) == List of environment topics == It appears that you're determined to link every article in Wikipedia to List of environment topics. Why? User:Josh Parris User_talk:Josh Parris 05:54, 10 Jun 2005 (UTC) Perhaps your life would be easier if you discovered many of these topics are collected under :Category:Environment, :Category:Ecology and :Category:Environmentalism and as such do not need to point to a list that points to them. For more information, read wikipedia:category and perhaps involve yourself in Wikipedia:WikiProject Ecology or Wikipedia:Categorization projects (current). Perhaps also of interest is Wikipedia:Merge some redundant lists to categories. User:Josh Parris User_talk:Josh Parris 07:33, 10 Jun 2005 (UTC) Hi, Josh Parris. If the links which I made to list of environment topics were inappropriate, I apologize. Thank you for the links to pages with information about categories. User:Wavelength 17:46, 10 Jun 2005 (UTC) :While I am not sure whether the links were such a great idea, there was nothing inappropriate about your actions. Some of Josh's actions, on the other hand, did seem a little inappropriate. Don't worry about it, Be Bold in your editing, and don't let impolite comments get to you. User:Guettarda 20:37, 10 Jun 2005 (UTC) It is great that you have been diligent on the List of environment topics page. You have pipped me to the post on updating the article. However, I feel that you are a little too zealous in adding articles to the list. For instance I have deleted two ships that are responsible for oil spills since they are covered in the oil spill article which was also listed. With your rationale we could list every single aspect of human endevour since environmental effects are wide ranging. But as already pointed out: Be bold.User:Alan Liefting 08:44, 12 Jun 2005 (UTC) :Thank you for what seems like a compliment. I was unfamiliar with the expression "pipped ... to the post", so I searched with Google for web pages with each page having both of the words "pipped" and "post" anywhere on the page, and, according to [http://www.allwords.com/word-pipped%20at%20the%20post.html], it seems to mean "narrowly defeated". A choice of preposition is indicated at [http://www.vocaboly.com/forums/ftopic5618-15.html]. I want this to be a collaboration, not a competition. :I have been increasing the list of topics in order to give readers a more complete view of the environment (because a holistic view of its many challenges helps us to understand its interconnectedness), and in order to encourage the writing of new articles. I possibly seemed to be impolite in ignoring a question from User:Josh Parris above, but answering "Why?" after an exaggerated statement seemed to imply accepting the exaggeration. :Why have you moved one paragraph of the introduction to the list of environment topics to the talk page? It seems to me that it was more useful where it was, guiding editors on what should be listed and what should not be listed. User:Wavelength 23:41, 12 Jun 2005 (UTC) == Whether to capitalize list items == Wavelength, you are right. The section at Wikipedia:Lists#1_-_Title_and_bullet_style_or_vertical_style does say "Do not capitalize list items ...". I don't think you have misunderstood the policy. I have approached capitalization of list items from a typographical perspective. The See also sections of articles are a list of links to related articles, and aren't arranged as a list for linguistic reasons. Liguistically, the Wikipedia:Lists policy is absolutely right: lists are another representation of a semi-colon seperated sentence, and as such capitalizing the first word is generally inappropriate. But in my view, See also sections aren't another layout of a sentence, but instead a typographical list of related articles - an example of which can been seen at the bottom of Wikipedia:Lists, where the links to articles, by name (as opposed to in passing within a paragraph), is capitalized. I believe this is because the articles are being explicitly referred to. User:Josh Parris User_talk:Josh Parris 08:30, 14 Jun 2005 (UTC)
See other meanings of words starting from letter:
Words begining with Wavelength:
Wavelength
Wavelength
Wavelength
Wavelength-division_multiplexed
Wavelength-division_multiplexing
Wavelengths
Wavelength_dispersive_X-ray_spectroscopy
Wavelength_Division_Multiplex
Wavelength_division_multiplex
Wavelength_Division_Multiplexing
Wavelength_division_multiplexing
Wavelength
The wavelength is the distance between repeating units of a wave pattern. It is commonly designated by the Greek language letter ''lambda'' (λ). In a sine wave, the wavelength is the distance between peaks: The ''x'' axis represents distance, and ''I'' would be some varying quantity (for instance air pressure for a sound wave or strength of the electric field or magnetic field for light), at a given point in time as a function of ''x''. Wavelength ''λ'' has an inverse relationship to frequency ''f'', the number of peaks to pass a point in a given time. The wavelength is equal to the speed of the wave type divided by the frequency of the wave. When dealing with electromagnetic radiation in a vacuum, this speed is the speed of light ''c'', for signals (waves) in air, this is the speed of sound in air. The relationship is given by: : where: :λ = wavelength of a sound wave or electromagnetic wave :''c'' = speed of light in vacuum = 299,792.458 kilometre per second ~ 300 0000 km/s = 300,000,000 m/s or :''c'' = speed of sound in air = 343 m/s at 20 °C (68 °F) :''f'' = frequency of the wave For radio waves this relationship is approximated with the formula: wavelength (in metres) = 300 / frequency (in megahertz). When light waves (and other electromagnetic waves) enter a medium, their wavelength is reduced by a factor equal to the refractive index ''n'' of the medium but the frequency of the wave is unchanged. The wavelength of the wave in the medium, λ' is given by: : where: :λ0 is the vacuum wavelength of the wave Wavelengths of electromagnetic radiation, no matter what medium they are travelling through, are usually quoted in terms of the vacuum wavelength, although this is not always explicitly stated. Louis-Victor de Broglie discovered that all particles with momentum have a wavelength associated with their quantum mechanics wavefunction, called the de Broglie wavelength. == See also == *Waves *frequency *period *amplitude *de Broglie wavelength == External link == *[http://www.sengpielaudio.com/calculator-wavelength.htm Conversion: Wavelength to frequency and vice versa - The calculator] ---- *Wavelength is the title of a 1978 album by Van Morrison. Length Wave mechanics nds:Bülgenläng
Wavelength
How Do You Find Wavelength? == Redirect change == I suggest that de Broglie wavelength redirects to de Broglie hypothesis, not here. It makes more sense, and de Broglie hypothesis has a much better description. Perhaps a rewrite is then needed of that section of this page to reflect that. Any objections?
--User:Blinken 11:45, 27 Apr 2005 (UTC) :I can't believe it redirects here instead of de Broglie hypothesis already. I went ahead and changed it, figuring I should be bold. In light of that, the section in here about the de Broglie wavelength probably does need to be rewritten and shortened a bit. --User:Laurascudder | User talk:Laurascudder 19:36, 27 Apr 2005 (UTC) ::Went ahead and moved it over. --User:Blinken 02:19, 4 May 2005 (UTC) == Lambda = C / f == Would it be worth using the more general formula here, instead of ? Or perhaps mentioning that the formula can be used with other waves by replacing the speed of light with the speed of the individual wave? --User:Defragged 13:23, 13 Jun 2005 (UTC) :Yes -- User:Tim Starling 04:11, Jun 14, 2005 (UTC)
Wavelength
User:Jfdwolff | User_talk:Jfdwolff 06:41, 20 May 2005 (UTC) PS Could you please start contributing content, instead of adding external links? ==Cruise ship== Hi Wavelength, I removed the external link you added to Cruise ship. I don't have a problem with discussing the negative impact of Cruise ships, but it should be done in an NPOV way in the article, not just an external link. -- User:Solipsist 07:51, 6 Jun 2005 (UTC) == List of environment topics == It appears that you're determined to link every article in Wikipedia to List of environment topics. Why? User:Josh Parris User_talk:Josh Parris 05:54, 10 Jun 2005 (UTC) Perhaps your life would be easier if you discovered many of these topics are collected under :Category:Environment, :Category:Ecology and :Category:Environmentalism and as such do not need to point to a list that points to them. For more information, read wikipedia:category and perhaps involve yourself in Wikipedia:WikiProject Ecology or Wikipedia:Categorization projects (current). Perhaps also of interest is Wikipedia:Merge some redundant lists to categories. User:Josh Parris User_talk:Josh Parris 07:33, 10 Jun 2005 (UTC) Hi, Josh Parris. If the links which I made to list of environment topics were inappropriate, I apologize. Thank you for the links to pages with information about categories. User:Wavelength 17:46, 10 Jun 2005 (UTC) :While I am not sure whether the links were such a great idea, there was nothing inappropriate about your actions. Some of Josh's actions, on the other hand, did seem a little inappropriate. Don't worry about it, Be Bold in your editing, and don't let impolite comments get to you. User:Guettarda 20:37, 10 Jun 2005 (UTC) It is great that you have been diligent on the List of environment topics page. You have pipped me to the post on updating the article. However, I feel that you are a little too zealous in adding articles to the list. For instance I have deleted two ships that are responsible for oil spills since they are covered in the oil spill article which was also listed. With your rationale we could list every single aspect of human endevour since environmental effects are wide ranging. But as already pointed out: Be bold.User:Alan Liefting 08:44, 12 Jun 2005 (UTC) :Thank you for what seems like a compliment. I was unfamiliar with the expression "pipped ... to the post", so I searched with Google for web pages with each page having both of the words "pipped" and "post" anywhere on the page, and, according to [http://www.allwords.com/word-pipped%20at%20the%20post.html], it seems to mean "narrowly defeated". A choice of preposition is indicated at [http://www.vocaboly.com/forums/ftopic5618-15.html]. I want this to be a collaboration, not a competition. :I have been increasing the list of topics in order to give readers a more complete view of the environment (because a holistic view of its many challenges helps us to understand its interconnectedness), and in order to encourage the writing of new articles. I possibly seemed to be impolite in ignoring a question from User:Josh Parris above, but answering "Why?" after an exaggerated statement seemed to imply accepting the exaggeration. :Why have you moved one paragraph of the introduction to the list of environment topics to the talk page? It seems to me that it was more useful where it was, guiding editors on what should be listed and what should not be listed. User:Wavelength 23:41, 12 Jun 2005 (UTC) == Whether to capitalize list items == Wavelength, you are right. The section at Wikipedia:Lists#1_-_Title_and_bullet_style_or_vertical_style does say "Do not capitalize list items ...". I don't think you have misunderstood the policy. I have approached capitalization of list items from a typographical perspective. The See also sections of articles are a list of links to related articles, and aren't arranged as a list for linguistic reasons. Liguistically, the Wikipedia:Lists policy is absolutely right: lists are another representation of a semi-colon seperated sentence, and as such capitalizing the first word is generally inappropriate. But in my view, See also sections aren't another layout of a sentence, but instead a typographical list of related articles - an example of which can been seen at the bottom of Wikipedia:Lists, where the links to articles, by name (as opposed to in passing within a paragraph), is capitalized. I believe this is because the articles are being explicitly referred to. User:Josh Parris User_talk:Josh Parris 08:30, 14 Jun 2005 (UTC)
See other meanings of words starting from letter:
W
WA | WB | WC | WD | WE | WF | WG | WH | WI | WJ | WK | WL | WM | WN | WO | WP | WR | WS | WT | WU | WX | WY | WZ |Words begining with Wavelength:
Wavelength
Wavelength
Wavelength
Wavelength-division_multiplexed
Wavelength-division_multiplexing
Wavelengths
Wavelength_dispersive_X-ray_spectroscopy
Wavelength_Division_Multiplex
Wavelength_division_multiplex
Wavelength_Division_Multiplexing
Wavelength_division_multiplexing
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