Re: [Phys-L] Percent of Sun Covered Duing Eclipse
Were you using a light meter? If so, I would have expected in the neighborhood
of an 88% drop.
But not if your perception was relying on your eyes which adapt to different
light levels easily. It may have been objectively 88% darker but your
magnificent eye-brain system decided you still needed to see, so it told you it
wasn’t really that dark.
Larry
> On Apr 8, 2024, at 4:14 PM, dgpolvani--- via Phys-l <phys-l@mail.phys-l.org>
> wrote:
>
> Here in Baltimore one of the weather stations announced our partial eclipse
> would be 88% at maximum (3:02 pm EDT). At this time, the sky did grow
> darker, but not as dark as I expected given an 88% eclipse. Was the weather
> report wrong, or is the amount of sunlight received by a spot on the earth
> not directly proportional to the amount of the sun's disk visible at that
> spot? I am ignoring secondary effects such as the sun's corona.
>
> Don Polvani retired physicist, engineer
>
>
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