Features

• It is an experimental instrument that directly verifies the law of gravitation by observing how large and small lead spheres attract each other and determining the constant of gravitation.
• Although the force applied to the lead spheres is weak, of the order of 10^-9, it can be detected as the movement of the projection point of about 1.6° (about 3 cm when projected to a point 1 m from the mirror) by reflecting the laser beam to the mirror mounted only in torsion.
• The value of the universal gravitation constant G is determined with a high accuracy within 10% for the true value of 6.67×10^-11 N · m^2 · kg^-2.
• You can experiment with two methods: final displacement measurement and acceleration measurement.
• A unique mechanism in which the distance between large and small lead spheres is changed and the inverse square law can be verified.
• Built-in oil damper.
• Data can be obtained after about 20 minutes of measurement.