Carl Fredrik Ahl

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About Carl Fredrik Ahl

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  1. Carl Fredrik Ahl

    Why You Feel Tired When It's Hot

    But generating more heat means more energy being used. Yeah, but even if you drink much water, you still can feel tired when it's hot right?
  2. Carl Fredrik Ahl

    Why You Feel Tired When It's Hot

    No, I just guessed. Okay, but why doesn't you feel tired when your cold? Then the body also has to regulate the body temperature.
  3. Hi, I have a theory that you get tired when it's hot because there is less oxygen in hot air than in cool air. Is this why you get tired or are there other factors?
  4. Carl Fredrik Ahl

    How Laser Guided Bombs Works

    Hi, I know that laser guided bombs works by projecting a laser to an object and the bomb will have a photosensor that tries to keep the reflected laser in the center of the sensor, right? What I wonder is how does it know how to move in order to keep the laser in the center of the photosensor? Is this the only thing it requires to hit the target? Trying to move little all the time to keep the reflected laser in the center of the photosensor?
  5. Carl Fredrik Ahl

    Laser Microphone

    Hi, I wonder how the laser coming out from a laser microphone gets affected by sound waves.
  6. Carl Fredrik Ahl

    How Monochrome Displays Works

    Hi, I wonder how monochrome, sunlight-visible, transflective memory-in-pixel (MIP) displays works. Like the one on my Garmin Instinct. Does it work like e-ink displays? The more light getting on the watch, the easier you see the display. When it's dark you can't see it at all. Image below.
  7. Carl Fredrik Ahl

    Unregulated Wattage

    Thx, now I understand, when the voltage of the battery drops, more current is needed instead so more amps will be used, but how can the circuit decide how many amps will be used? How can it increase the current when the voltage get lower?
  8. Carl Fredrik Ahl

    Unregulated Wattage

    My device's output voltage is from 0.5 to 9 volts and the battery is 1600mAh. If it uses 9 volt when vaping 50 watts, how can it then vape at 50 watts when the voltage drops down to like 5 volts for example? Thx for the answer, but can you explain in more detail plz?
  9. Carl Fredrik Ahl

    Unregulated Wattage

    Hi, I wonder how devices like vapes for example can have the same wattage until the battery dies. Shouldn't wattage drop down when the battery level drops, because then the voltage will be lower?
  10. Hi, I wonder why cooling things very quickly makes it permanently harder. Why won't it get back to normal hardness when the temperature goes up again? Toughened glass used in car windshields is made by cooling molten glass very quickly to make it much harder.
  11. Hi, I wonder what "universal bandwidth compression" compresses. How and what type of data can it compress?: "Devices require less frequent charging thanks to a low-power Cortex A53 processor and efficiency-boosting features like universal bandwidth compression.".
  12. Carl Fredrik Ahl

    How PDAF Works?

    Hi, I understand the principle of how PDAF (Phase Detection Auto Focus) works. Look at the image I inserted. I don't understand how the incoming light splits into two rays of light in the two extreme sides of the lens. Why aren't lots of rays of light coming all over the lens? Source: https://photographylife.com/how-phase-detection-autofocus-works
  13. Carl Fredrik Ahl

    Hydration Headache

    Yeah ok, thx for the answer. Now I wonder what happens when it pull away for the skull except feeling pain. Is there any benefit for the brain to do so?
  14. Carl Fredrik Ahl

    Hydration Headache

    Yeah ok thx for explaining. No I wonder why does it pull away from the skull? Is it because the movement when it shrivels? and what happens when it pull away for the skull except feeling pain. Is there any benefit for the brain to do so?
  15. Carl Fredrik Ahl

    Smart Watch Ambient Mode

    Hi, Let's say that the watch in this example is AMOLED so that the battery usage depend on the color of the display: When smart watches go to ambient mode the background of the screen turn dark (in most cases, some just reduce brightness of the screen) and the rest of the watch face turns white. I wonder why the rest of the watch face turn white, which is the most battery consuming color to display, rather than red for example, which only require the red led to light up? I know that it's easier to see white, but red would save more battery.