Using a light meter, measure the light falling on the side of their face closest to the light source (i.e., the highlight side). Let’s say that measures f/8. (Keep your shutter speed the same for all measurements to maintain consistency.) Then bring in your reflector and use the l...
So, in short, fluorescent lights make their energy in a three-step process: Electrodes take electrical energy from the power supply and generate moving electrons. The moving electrons collide with mercury atoms in the tubes to make ultraviolet light. The white phosphor coating of the tubes convert...
Numerical aperture - measure of the light-collecting ability of the lens Resolution - the closest two objects can be before they're no longer detected as separate objects (usually measured in nanometers) Read More Lots More Information Related HowStuffWorks Articles How Light Works How Telescopes...
We measure it in units of cycles (waves) per second, or hertz. The frequency of visible light is referred to as color, and ranges from 430 trillion hertz, seen as red, to 750 trillion hertz, seen as violet. Again, the full range of frequencies extends beyond the visible portion, from...
To measure the amount of the grow light inside the grow tent, use aPAR Meter. Measuring light is important to ensure the optimal PPFD values to make plants thrive and yield. Using a PAR meter shows how much energy the grow light gives off and what lands on the plant. The optimal range...
Transcriptional bursting has been linked to the stochastic positioning of nucleosomes. However, how bursting is regulated by the remodeling of promoter nucleosomes is unknown. Here, we use single-molecule live-cell imaging of GAL10 transcription in Saccharomyces cerevisiae to measure how bursting change...
Not a measure of brightness; instead, it’s a measure of how much electricity (or energy) a bulb consumes to reach its claimed brightness. Each type of light source, LED, Fluorescent, Halogen, or Incandescent has a different lumen-per-watt ratio. Below we’re going to use lum...
By measuring how far the laser beam travels, we can measure how much the cantilever bends and the forces acting on it from moment to moment, and that information can be used to figure out and plot the contours of the surface. Other versions of AFMs (like the one illustrated here) make...
Wattage is a measure of how much electricity (or energy) a light bulb consumes to achieve its lumen output. Each type of light source — LED, fluorescent, halogen or incandescent bulbs — has a differentlumen-to-watt ratio. If a 100-watt incandescent light produces 1,500 lumen...
Measure Your Wi-Fi Signal Strength on Mac OS X and Windows When setting up and maintaining a wireless network, you'll want to maintain good signal strength in all areas within the network perimeter. "Dead" spots of weak signal strength can cause connections to be dropped. With more and mor...