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Lamps

Lamp

1. A light-producing vessel, instrument or apparatus; especially, a vessel with a wick used for the combustion of oil or other inflammable liquid, for the purpose of producing artificial light.

2. Figuratively, anything which enlightens intellectually or morally; anything regarded metaphorically a performing the uses of a lamp. Thy word is a lamp unto my feet, and a light unto my path. (Ps. Cxix. 105) Ages elapsed ere Homer's lamp appeared. (Cowper)

3. (Science: physics) a device or mechanism for producing light by electricity. See incandescent lamp, under incandescent. Aeolipile lamp, a hollow ball of copper containing alcohol which is converted into vapor by a lamp beneath, so as to make a powerful blowpipe flame when the vapor is ignited.

arc lamp, any brachiopod shell of the genus terebratula and allied genera. The name refers to the shape, which is like that of an antique lamp. See terebratula. Safety lamp, a miners lamp in which the flame is surrounded by fine wire gauze, preventing the kindling of dangerous explosive gases; called also, from Sir Humphry Davy the inventor, Davy lamp. To smell of the lamp, to bear marks of great study and labour, as a literary composition.

Origin: f. Lampe, L. Lampas, -adis, fr. Gr, torch, fr. To give light, to shine. Cf. Lampad, lantern.


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Hi everybody I have a question about insects: Why insects go to light? for example in the night they whirl lamps :?:

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Sat Dec 24, 2011 8:39 am
 
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by Vaucheria
Thu Jul 07, 2011 3:49 am
 
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UltraBright UV transilluminator

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by swing0916
Thu Nov 11, 2010 10:49 am
 
Forum: Molecular Biology
Topic: UltraBright UV transilluminator
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Re: UltraBright UV transilluminator

I used a photospectrometer to check the spectrum at UV lamp and black glass positions, and found there is visible light emitted from the lamps. When the lights go through the black glass filter, there is nearly only UV rays transmitted. I guess it's why the image of DNA bands is with a better ...

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by swing0916
Sat Oct 16, 2010 1:31 pm
 
Forum: Molecular Biology
Topic: UltraBright UV transilluminator
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Re: UV Microscopy

... and filters between the objective and the eyepiece. But I did want to mention a problem with some older microscopes that use the big mercury-vapor lamps as a UV source. The housing for these lamps have openings to allow for cooling and a lot of UV escapes thru the openings in the housing. Many ...

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by Fauna
Mon Jul 28, 2008 9:24 pm
 
Forum: General Discussion
Topic: UV Microscopy
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