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The truth is the Earth is slightly OVAL, because it is spinning.
The circumference around the equator is slightly different that from north pole to south pole to north pole.
But for all practical purposes it is round.
On another note the fabric of space/time does bend around a gravity dense object, so much so that it has to be factored into the programming of our GPS devices.
Gravity forces LARGE celestial bodies to become round, only acting forces such as velocity can cause flex, but you would not see it if looking upon the earth from the surface of the moon.
As for projecting a spot, not a tiny dot, but a visible spot at 5680 feet, I have done it with a 200mw 532 module mounted in a heat sink and I replaced the final focus lens with a wider longer focal length sliding to focus lens, you can do it for 100 dollars.
The circumference around the equator is slightly different that from north pole to south pole to north pole.
But for all practical purposes it is round.
On another note the fabric of space/time does bend around a gravity dense object, so much so that it has to be factored into the programming of our GPS devices.
Gravity forces LARGE celestial bodies to become round, only acting forces such as velocity can cause flex, but you would not see it if looking upon the earth from the surface of the moon.
As for projecting a spot, not a tiny dot, but a visible spot at 5680 feet, I have done it with a 200mw 532 module mounted in a heat sink and I replaced the final focus lens with a wider longer focal length sliding to focus lens, you can do it for 100 dollars.
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