Light Intensifier and Reticle

Light Intensifier and Reticle

On the left below the aperture the device has a brightness knob. Apart from powering on and off the device, this knob controls the brightness of the reticle allowing for the reticle to be visible without outshining the target. The reticle has markings that match targets of various heights from 0.3 m to 2.7 m at distances ranging from 100 m to 970 m. This is similar to the reticle of the 1PN51.

— — — — — —

Solar street light - Wikipedia

The city of Las Vegas, Nevada was the first city in the world that tested new EnGoPlanet Solar Street lights which are coupled with kinetic tiles that produce electricity when people walk over them. • Solar street lights are independent of the utility grid. Hence, the operation costs are minimized. • Solar street lights require much less maintenance compared to conventional street lights. • Since external wires are eliminated, risk of accidents are minimized. • Separate parts of a solar panel system can easily be transported. • Risk of theft is higher as equipment costs are comparatively higher. • Snow or dust, combined with moisture can accumulate on horizontal PV-panels and reduce or even stop energy production. • Rechargeable batteries will need to be replaced several times over the lifetime of the fixtures adding to the total lifetime cost of the light.

— — — — — —

Questions About Light & Light Independent Reactions!?

a) Transfer Electrons through electron transport system - LIGHT b) Uses ATP as an energy source. -DARK c) Light energy is required. -LIGHT d) Uses CO2 -DARK e) Splits water - LIGHT f) Makes NADPH - LIGHT g) Makes glucose - DARK

— — — — — —

Replacing Lighted Ceiling Fan w Fixed Light

You explained it perfectly and yes, you can keep it that way or switch the black wire from the fixture to the red wire and cap the black. You would want the switch that's the easiest to find, in the dark, to control the light

— — — — — —

Does a pool light fixture itself usually have holes in it to allow water to fill around the pool light?

The pool light fixture sits in the niche there is a lip at the bottom of the fixture face ring that sits in a race at the bottom of the niche and one screw at the top this is what holds the light in the wall of the pool and yes the water will get in the niche. The holes you see in the face ring is used to hold the lens to the base with brass screws. If there is water in the light fixture it is unsafe and should not be used until it is repaired. You will need to replace the lens gasket after drying out the light fixture and checking the light bulb to be sure it is good. When putting the new lens gasket on be sure you tighten all the screw to insure the light fixture does not leak

— — — — — —

Creating a ZigBee Light Link Compatible Light

Yes, you can do this with a MeshBee or any other controller with an NXP JN516x chip. Read all the details here: Custom Hue lights

— — — — — —

wavelength of white light turned into blue light?

Rest assured, your blue light, whatever the source, will have a blue light wavelength if that source is standardized. Why? Because that wavelength L from e = hc/L determines the energy of the photons you are perceiving as blue. A longer L would result in a redder hue and a shorter one would be bluer. But understand this.painting over with blue paint is unlikely to produce the standard blue wavelength that, say, an LED might create. There is a range of wavelengths within which there would be a consensus that the light is blue. So, no, blue light is not always the standard blue. Further, for a "blue" wavelength, there will be some variance as to just how blue the same light source is from person to person. That's not because the wavelength varies, but because a person's interpretation of just how blue that wavelength is varies with the person. E.g., what is sky blue to you might be aquamarine to me, but it will be the same wavelength we are seeing.

— — — — — —

What is the relation between light and shadow?

A shadow is caused by the absense of light. So this seems like asking 'is there a point between a place where light falls and a place where it's absent?" which doesn't make sense - either there is light or there isn't.The only way I can understand this question is if the intention is 'are shadows absolutely sharp or is there an intermediate region. "Some shadows are blurred, either because the light does not come from a point source (like shadows from a fluorescent lamp) or because the light doesn't come from a source far enough away, or because of the characteristics of the object causing the shadow, or the light source might have a diffusing lens, or a variety of other reasons. So the edge of the shadow isn't clear and you get a region which has both light and shadow mixed together.But let's say it's a very clear shadow, like sunlight outside at noon in summer. Still the shadow itself will not be completely dark, because the sky and the surroundings scatter light into it. Is there a defined border between shadow and light? It depends on everything above, the light source, the distance, etc. and also the scattered light (that is, the environment. And even the weather. )Now let's go further and take a completely, absolutely and utterly dark surface and cast light to make a shadow there too. Does the light just stop where the shadow starts?Obviously at the scale where our eyes see it, there is a region with light, and a sharp boundary where it stops. But what happens if we go closer? Is there still such a boundary?You can weaken the light down to a few photons, and then there will certainly be a region where the photons fall and a region where they don't. In that case there's no point where they both do and don't fall. But then you start thinking about quantum physics and the impossibility of actually pinpointing something in one single spot. So there could be a place where there is and isn't a photon. And if you go down to an even smaller scale and think about 'one single spot" - it's not clear if there actually is such a thing, because nobody understands what space actually is, or what happens to it at a quantum scale. This is called 'quantum gravity" and is one of the unsolved mysteries of physics today.What is the relation between light and shadow?Is there a point between a shadow and light?.