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Sunlight Reflection and Glare From Solar Panels

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  • Qyburn
    Qyburn Posts: 3,625 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper
    Remember when flicker from wind turbine blades was a thing? The tinfoil hat community will always be with us.
    Hopefully it still is considered. Our LA assesses shadow flicker out to 10x rotor diameter and in theory requires the turbines to be programmed to avoid it. 
  • Krakkkers
    Krakkkers Posts: 1,295 Forumite
    1,000 Posts Second Anniversary Name Dropper
    Got me thinking.
    What powers a mirror?
    In the dark does the mirror not work or does it reflect darkness?
    If you look in a mirror at the speed of light does it reflect?
  • Martyn1981
    Martyn1981 Posts: 15,395 Forumite
    Part of the Furniture 10,000 Posts Name Dropper Photogenic
    Krakkkers said:
    Got me thinking.
    What powers a mirror?
    In the dark does the mirror not work or does it reflect darkness?
    If you look in a mirror at the speed of light does it reflect?
    Does a mirror work in a forest, if there's nobody there to see it?

    Just something to reflect on, perhaps.
    Mart. Cardiff. 8.72 kWp PV systems (2.12 SSW 4.6 ESE & 2.0 WNW). 20kWh battery storage. Two A2A units for cleaner heating. Two BEV's for cleaner driving.

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
  • paul991
    paul991 Posts: 451 Forumite
    Third Anniversary 100 Posts
    maybe can put a mirror on the back of the opposite  house then I would get the early morning sun on my panels 
  • Alnat1
    Alnat1 Posts: 3,868 Forumite
    1,000 Posts Third Anniversary Photogenic Name Dropper
    Hang a mirror next to your window and angle it so it reflects the light back to the house that's causing the problem.
    Barnsley, South Yorkshire
    Solar PV 5.25kWp SW facing (14 x 375) Lux 3.6kw hybrid inverter installed Mar 22 and 9.6kw Pylontech battery 
    Daikin 8kW ASHP installed Jan 25
    Octopus Cosy/Fixed Outgoing 
  • Reed_Richards
    Reed_Richards Posts: 5,338 Forumite
    Part of the Furniture 1,000 Posts Photogenic Name Dropper
    edited 5 August 2024 at 7:09AM
    Krakkkers said:

    If you look in a mirror at the speed of light does it reflect?
    When you look at someone's face you see light that has struck their face, some of which has been absorbed and the rest reflected off.  When you look at your own face in a mirror you see that light from your face that has been reflected off the silvered surface behind the glass of the mirror and then to your eye.  So if you could turn your head really fast to look in a mirror you might see the image of the side of your head! But relativity causes all sorts of strange effects when you travel at any speed approaching the speed of light which I am not accounting for.  And the speed with which your optic nerve conveys information to your brain is not great so what you see is always subject to a small delay.    
    Reed
  • Martyn1981
    Martyn1981 Posts: 15,395 Forumite
    Part of the Furniture 10,000 Posts Name Dropper Photogenic
    Krakkkers said:

    If you look in a mirror at the speed of light does it reflect?
    When you look at someone's face you see light that has struck their face, some of which has been absorbed and the rest reflected off.  When you look at your own face in a mirror you see that light from your face that has been reflected off the glass surface of the mirror and then to your eye.  So if you could turn your head really fast to look in a mirror you might see the image of the side of your head! But relativity causes all sorts of strange effects when you travel at any speed approaching the speed of light which I am not accounting for.  And the speed with which your optic nerve conveys information to your brain is not great so what you see is always subject to a small delay.    
    So ........ I always look younger in a mirror.  B)
    Mart. Cardiff. 8.72 kWp PV systems (2.12 SSW 4.6 ESE & 2.0 WNW). 20kWh battery storage. Two A2A units for cleaner heating. Two BEV's for cleaner driving.

    For general PV advice please see the PV FAQ thread on the Green & Ethical Board.
  • Heedtheadvice
    Heedtheadvice Posts: 2,772 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    edited 4 August 2024 at 11:54PM
    Oh I hate to be picky but
    " When you look at your own face in a mirror you see that light from your face that has been reflected off the glass surface of the mirror and then to your eye. " is not strictly true but a good general description!! Not 'off the glass' really.
    For the majority of mirrors that we see:
    The light passes through the glass ( angle dependent ) and reflects off the 'silvering' on the back surface and then back through the glass.....approximately, as there are other effects potentially at play too such as refraction, interference and transmission losses.
    That us why specialist mirrors often do not have glass.

  • Reed_Richards
    Reed_Richards Posts: 5,338 Forumite
    Part of the Furniture 1,000 Posts Photogenic Name Dropper
    @Heedtheadvice you're absolutely correct and I knew that but wasn't thinking about it at the time.  I have amended my post.  Light travels more slowly through glass than through air so you even have a bit more time to see the side of your face when turning your head really fast.
    Reed
  • Heedtheadvice
    Heedtheadvice Posts: 2,772 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    Tee hee......just thinking of that film with the rotating head.....

    And there I thought I was always being found out  because my wife had eyes in the back of her head. She was just very fast and I am slow.....
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