Wavelength Leds
Wavelength Leds - Related Videos
02:32
The de Broglie Wavelength
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2020
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
07:40
Using Affordable LED Arrays for Photo-Stimulation of Neurons
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Cited by 7 •
2011
Adult-born neurons expressing ChR2 can be manipulated in slice electrophysiological preparations in order to examine their contribution towards the function of olfactory neural circuits.
01:33
Synergistic Photobiomodulation with a Dual-Wavelength Laser in an In Vitro Disease Model
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2025
Divide the transwell system into five groups that undergo various treatments.The first group serves as the control and consists of a co-culture of neuroblastoma and microglia cells.In the second group, treat the co-culturer with fibrillar β-amyloid (fAβ) alone. fAβ induces damage in neuroblastoma cells.In the third group, treat neuroblastoma cells with an 808-nanometer laser, then co-culture them with untreated microglia.The laser reduces oxidative stress, improving neuronal survival.In the...
08:41
Single Wavelength Shadow Imaging of Caenorhabditis elegans Locomotion Including Force Estimates
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Cited by 2 •
2014
The technique presented here measures the path of freely swimming microscopic species using single wavelength exposure. C. elegans are used to demonstrate shadow imaging as an inexpensive alternative to costly microscopes. This technique can be adapted to accommodate various orientations, environments and species to measure direction, speed, acceleration and forces.
07:24
Development of an Innovative LED-based Illumination Device for In Vitro Application of Photodynamic Therapy with Rose Bengal
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2025
This manuscript presents a novel, innovative 3D-printed illumination device for studying Rose Bengal-mediated photodynamic therapy in vitro.
FAQs
A semiconductor’s band gap sets the energy released when charge carriers recombine, which determines the energy of emitted photons and therefore their wavelength. Changing the device material or design changes this relationship, allowing LEDs to target different spectral regions. In biological experiments, this links the selected illumination to photon energy relevant to a cellular or molecular response.
LED composition and device design provide the primary control over emission wavelength, while filters can further define the light reaching a sample. Combining multiple LEDs can create selected spectral conditions rather than relying on one emission region. These options help researchers control spectral composition and compare biological responses under reproducible illumination.
Matching the emitted wavelength to a molecule or organism can increase signal specificity and reduce unwanted exposure. The selected spectral region determines which photon energies reach the biological system, helping researchers connect illumination with observed responses. This is especially useful when an experiment must distinguish a targeted light-dependent effect from responses caused by less suitable spectral conditions.
Selection begins by identifying the molecule, organism, or light-dependent process being examined, then choosing an emission region that corresponds to the relevant biological target. Filters or multiple LEDs can refine the spectral conditions when one source is insufficient. Maintaining defined, reproducible illumination allows comparisons between samples and supports interpretation of responses in relation to photon energy and spectral composition.
In fluorescence microscopy, selected wavelengths provide controlled illumination for examining fluorescent signals. Matching the light to the relevant molecular response can improve signal specificity, while defined spectral conditions help limit unwanted exposure. LEDs, filters, or combinations of emission regions can therefore support reproducible imaging conditions and help researchers relate observed fluorescence to the illumination spectrum.
These light sources support photosynthesis studies, photoreceptor assays, and other light-controlled experiments in which spectral composition influences biological responses. Researchers can compare how cells, molecules, or organisms respond to selected photon energies and use reproducible illumination to interpret those outcomes. This makes the approach relevant to investigations connecting electromagnetic-spectrum conditions with cellular or organismal activity.