jeffh (44 spectra and 7 sets) | RSS | Public Lab profile »



Signed up: about 6 years ago
Tags added: 131

Laser wavelength and fluore...

jeffh | 2 spectra | 0

To show the importance of laser wavelength in producing fluorescence, I illuminated the same semi-transparent plastic cap from a yellow highlighter with 405-nm (violet/blue) and 532-nm (green) lase...


Low blue fluorescent bulb

jeffh | 2 spectra | 0

This compares a standard compact fluorescent bulb with one of the same size and nominally the same 13-watt power draw that is marketed as low blue light, to avoid blue illumination that can disturb...


Supposedly ultr...

jeffh | about 5 years ago

CFL with multip...

jeffh | about 5 years ago

'Ultraviolet fl...

jeffh | almost 6 years ago

Green laser ill...

jeffh | almost 6 years ago


Fluorescence fr...

jeffh | almost 6 years ago

405 nm laser il...

jeffh | almost 6 years ago

405 nm laser di...

jeffh | almost 6 years ago 1

405 nm laser il...

jeffh | almost 6 years ago


405 nm laser il...

jeffh | almost 6 years ago

CFL check - no ...

jeffh | almost 6 years ago

Compact fluores...

jeffh | almost 6 years ago

Low blue compac...

jeffh | almost 6 years ago


Charles river w...

jeffh | almost 6 years ago

Incandescent bu...

jeffh | almost 6 years ago

red glass filte...

jeffh | almost 6 years ago

Orange plastic ...

jeffh | almost 6 years ago


Blue plastic fi...

jeffh | almost 6 years ago

Green plastic f...

jeffh | almost 6 years ago

Different part ...

jeffh | almost 6 years ago

Fluorescent tub...

jeffh | almost 6 years ago


Charles river w...

jeffh | about 6 years ago

Charles river w...

jeffh | about 6 years ago

Charles River w...

jeffh | about 6 years ago

Charles river w...

jeffh | about 6 years ago 1


Difference betw...

jeffh | about 6 years ago

Charles River W...

jeffh | about 6 years ago

Charles River W...

jeffh | about 6 years ago

Empty half-pint...

jeffh | about 6 years ago


Tap water in ha...

jeffh | about 6 years ago

Tap water in ha...

jeffh | about 6 years ago