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light

Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that is perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths).In physics, the term "light" may refer more broadly to electromagnetic radiation of any wavelength, whether visible or not. In this sense, gamma rays, X-rays, microwaves and radio waves are also light. The primary properties of light are intensity, propagation direction, frequency or wavelength spectrum and polarization. Its speed in a vacuum, 299 792 458 metres a second (m/s), is one of the fundamental constants of nature. Like all types of electromagnetic radiation, visible light propagates by massless elementary particles called photons that represents the quanta of electromagnetic field, and can be analyzed as both waves and particles. The study of light, known as optics, is an important research area in modern physics.
The main source of light on Earth is the Sun. Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps. With the development of electric lights and power systems, electric lighting has effectively replaced firelight.

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  1. Jaminjar

    I'm Looking For This Tile Looking for 197 x 197 x 8.3 light cream tiles please

    I need 48 (plus a few more for breakages, so about 60 really) light white/cream 197 x 197 x 8.3mm tiles. I’m wanting to patch up my floor rather than dig it up and start again as moneys a bit tight right now. The rest of my floor has Pavigres, Pavigres 21, Uni Pérola. PG62. 197x197mmx8.3mm...
  2. A

    Grout Question about matching a sealant to a grout - Topps Tiles Neutral Light

    Hello. I am new to all this so apologies if I have posted in the wrong area. My bathroom is being tiled and I found the perfect grout from Topps Tiles (Natural Light - Bal NL1) but my tiler has just told me they don't do a matching sealant. Does anyone know if there is a replica of this...
  3. S

    Light weight backer board

    I need to overboard an 1800 wide paramount plasterboard wall that only has studs at 900 centres. (one at each and and one in the middle running vertically) part of the wall will be in a shower cubicle so needs good waterproofing i think hardi or even aquapanel might be a bit too heavy and...
  4. S

    Would anyone be able to advise on repairing a chip on a light beige porcelain tile?

    Would anyone be able to advise on repairing a chip on a light beige porcelain tile?
  5. S

    I'm looking for Nuances Cendre floors tiles in light grey 600 x 600.

    Will pick up from anymore. Need 8m sq max. Thanks. Sarah
  6. Debbi O

    I'm Looking For This Tile Looking for BCT HD Mimeo gloss wall tiles

    Looking for BCT HD Mimeo gloss wall tiles in dark or light grey - only a few needed for a boxing in job.
  7. D

    Light Marks On Tiles

    I am finding light blotches on my bathroom wall tiles, they are ceramic from British Ceramic Tile. I fitted the tiles to the walls of my bathroom three months ago with Dunlop RX 2000, I used a notched trowel and back buttered every tile with a coverage of 100%. Grout is Dunlop as well. I...
  8. L

    Light weight adhesives

    Light weight adhesives! For those of you that have used them enough to have an informed opinion what’s the pros and cons vs standard addy? I’m interested to see what the consensus is out there.
  9. J

    I'm Looking For This Tile Toronto Light Biege

    looking for EtiliSeramik 45 x 45cm floor tile toronto light biege
  10. J

    I'm Looking For This Tile Toronto Light Beige tiles

    has anyone got EtiliSeramik Toronto Light Beige 45cm x 45 cm floor tiles
  11. C

    I'm Looking For This Tile Mimeo light grey satin floor 50 x 30cms

    I need 9sq mtrs of these tiles. Can collect if need be.
  12. G

    I'm Looking For This Tile Looking for these dark and light grey bathroom tiles..

    Hello, Can anyone help me to find my bathroom tiles? I'm planning changes in my bathroom, which will mean exposing part of the wall which was not tiled (being hidden behind units and a bath) - so I'm looking for these tiles to tile the exposed areas - see attached photos. So I am looking for...
  13. K

    Dropped ceiling shadow light detail

    Hi, I would like to find a detail to give the best lighting effect for bathroom dropped ceiling shadow (led strip) lighting , any suggestions welcome? See attached. The detail in attached seems to a lot in terms of the drop or spacing of the edge of the dropped ceiling from the wall. Thanks
  14. E

    I'm Looking For This Tile Inalco P8130 Light Grey Stoneware Floor Tile

    Trying to find around 12 Inalco floor tiles P8130. Tiles are 33 x 33cm light grey stoneware with a tumbled(?) edge as photos. Tiles delisted and date from 1995. Would prefer new but good condition used would get me out of a fix!
  15. G

    Water UFH Heatmiser UH8-RF Control Unit - No Hot Water Light

    Hi Guys, I have a Heatmiser UH-8 RF control unit for my underfloor heating system downstairs and it's been working fine for over 2 years. Since yesterday however the HW (Hot Water) light isn't coming on, can anyone help me with this? The room controllers are working fine and talking to the...
  16. B

    I'm Looking For This Tile Wickes Azura Light Blue ref 230-130

    In need of only 4 of the 19.7cm x 29.7cm light blue wall tiles and 1 of the border tiles 6.4cm x 28cm ref 230-051
  17. C

    I'm Looking For This Tile Wanted: Anjelik light blue wall tiles

    I am looking for Anjelik light blue wall tiles 20 x 25 which were sold in Topps Tiles up until 2016. They were manufactured by Kale in Turkey. I only need a few and would be very grateful if anyone has any. Thank you.
  18. J

    Preparation Light fittings in kerdi

    i can’t seem to find any answers for this. Can you fit led spotlights in to Kerdi board? Cheer John
  19. S

    Light weight adhesives

    What are these light weight adhesives ? With what should we use them ? :confused:
  20. H

    Silicone removal, light film on edges

    I have recently done a job where I have siliconed like normal after a job and have noticed that because the tiles have small dimple patterns on that silicone has just stayed there. Also there is a light film down each side of the corner where the silicone tool has left it. Iv never had this...
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