Everyday Light - PowerPoint PPT Presentation

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Title:

Everyday Light

Description:

Everyday Light Optical emission Light bulb Light bulb Neon light Neon light Neon light Fluorescent lights Fluorescent lights Fluorescent light Bedroom stars Remote ... – PowerPoint PPT presentation

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Slides: 22
Provided by: ericp202
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Tags: everyday | light

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Title: Everyday Light


1
Everyday Light
2
Optical emission
fluorescence
phosphorescence
3
Light bulb
4
Light bulb
5
Neon light
6
Neon light
7
Neon light
8
Fluorescent lights
9
Fluorescent lights
Electrons flow through gas, ionizing the gas
Charged particles collide with gaseous mercury
Mercury becomes energetically excited
Energy is emitted as UV photons
UV photons excite phosphors on the inside of the
tube
phosphors emit fluorescence in the visible range
10
Fluorescent light
11
Bedroom stars
12
Remote control
13
Remote control
LED 980 nm
14
Motion sensor
15
Motion sensor
16
Laser pointer
17
Laser pointer
18
Laser pointer
19
Laser pointer
20
Laser pointer
Absorbs around 800 nm Fluoresces _at_ 1064 nm
divides wavelength by 2
21
Laser pointer
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