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The plate to remind you of how to calculate the deflection angle in gravitational lensing. deflection angle = 4GM/rc^2 where G is the gravitational constant, M is the mass of the lens, r is the impact parameter ( the perpendicular distance between the path of a projectile and the center of a potential field ) and c is the speed of light. Light reading for a light breakfast.
Dimensions 7"
$10.00
On Sale -$1.99
Your Price $8.01