Hi If you imagine one arm pointing to the top and the other to the bottom of the moon and the angle that makes with you. That is alpha (the angle of the unaided eye) Since this angle is small if that angle was part of a circle, it would not have much curve. Basically I say that the diameter of the moon (distance from top to bottom) is the arc length if I made that angle on a circle. Because that angle is so small. Also Becuase it is so far away the distance from me to the top, middle or bottom of the moon is almost the same, which would mean this was the radius of my circule. It is all to do with the fact it is a small angle and it is very far away I can approximate this. Hope that helps
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You're a blessing! Pls do engineering physics as well ❤️❤️
thank you so much for these videos!!!!!! they're really appreciated!
why did you use the diameter of the moon as the arc length??
Hi
If you imagine one arm pointing to the top and the other to the bottom of the moon and the angle that makes with you. That is alpha (the angle of the unaided eye)
Since this angle is small if that angle was part of a circle, it would not have much curve.
Basically I say that the diameter of the moon (distance from top to bottom) is the arc length if I made that angle on a circle. Because that angle is so small. Also Becuase it is so far away the distance from me to the top, middle or bottom of the moon is almost the same, which would mean this was the radius of my circule.
It is all to do with the fact it is a small angle and it is very far away I can approximate this.
Hope that helps
@@TLPhysics ohhhh okay yeah it does, thank you very much :)