Wow, Cavendish is so smart. Notice that the mirror is on the balance of the smaller masses. This way, the rotation will be greater comparing to the larger masses. Cavendish also set it up so that there are 2 masses being attracted to each other at opposite ends, so the gravitational force is amplified by x2.
@nhmllr725 There is a "springiness" in the suspension wire opposing the attraction. The point of the experiment is not to have them touch, but to measure the force gravity induces by measuring the small twist induced in the suspension rig.
To do this in real life, you'd want an enclosure to prevent even small air currents from messing up your measurements.
Did it actually work? At that time, there was no laser and no piezoelectric materials discovered. The amount of deflection must have been too small to detect. I may be wrong. Can some one shed light on this practical difficulty?
@Kenta19191919 That's a good question. I'd assume that they used magnify glasses to focus the sunlight to a point. Then for the mirror, it can be concave.
@infectedmordn This experiment brings two masses close together and measures the force of their gravitational attraction exhibited here through the (exaggerated in this video) twist in the sire suspension of two of the masses.
Ultimately this provides a measurement of the constant which describes the strength of gravitational forces in Newton's Law of Universal Gravitation.
i got a question my book says that cavendish discovered G, but a lot of people say that he merely measured the earths density and that G was only discovered 75 years later using his measurements, what was it then?
Wow, Cavendish is so smart. Notice that the mirror is on the balance of the smaller masses. This way, the rotation will be greater comparing to the larger masses. Cavendish also set it up so that there are 2 masses being attracted to each other at opposite ends, so the gravitational force is amplified by x2.
kokocipher 8 months ago
Awesome animation!
Well, would you mind if I use it in my next video, with due credit of course?
ASKaPHYSICIST 11 months ago
How long did it take for the lead balls to touch? Days?
nhmllr725 11 months ago
@nhmllr725 depending on the size (mass) of the balls it takes only a few minutes
gerardtheretard 11 months ago
@nhmllr725 There is a "springiness" in the suspension wire opposing the attraction. The point of the experiment is not to have them touch, but to measure the force gravity induces by measuring the small twist induced in the suspension rig.
To do this in real life, you'd want an enclosure to prevent even small air currents from messing up your measurements.
mrg3 11 months ago
where is the real life version of this?
dillmon1 1 year ago
@dillmon1 yea, I'd love to see a video recording of a real experiment taking place. I wonder how big the setup has to be to see any results though xD
kokocipher 8 months ago
Did it actually work? At that time, there was no laser and no piezoelectric materials discovered. The amount of deflection must have been too small to detect. I may be wrong. Can some one shed light on this practical difficulty?
Kenta19191919 1 year ago
@Kenta19191919 I did this experiment and used a simple electric lamp. If you used a raybox, you could use a candle.
whydidigetdeleted 1 year ago
@Kenta19191919 Cavendishes original experiment was huge thus the angle was easier to read
gerardtheretard 11 months ago
@gerardtheretard
I see. Making it big - sometimes is the ultimate solution to work on small quantities.
Kenta19191919 11 months ago
@Kenta19191919 That's a good question. I'd assume that they used magnify glasses to focus the sunlight to a point. Then for the mirror, it can be concave.
kokocipher 8 months ago
what can this " Experiment " do?`
infectedmordn 1 year ago
@infectedmordn This experiment brings two masses close together and measures the force of their gravitational attraction exhibited here through the (exaggerated in this video) twist in the sire suspension of two of the masses.
Ultimately this provides a measurement of the constant which describes the strength of gravitational forces in Newton's Law of Universal Gravitation.
mrg3 1 year ago 2
@mrg3 oh :D thx ^^
infectedmordn 1 year ago
Interesting animation which simplifies the Cavendish's Experiment.
It helped me quite a lot to understand the discovery of G.
WyrdaPT 2 years ago
i got a question my book says that cavendish discovered G, but a lot of people say that he merely measured the earths density and that G was only discovered 75 years later using his measurements, what was it then?
HizaguiC 2 years ago
thx, really help a lot.
winghoong 2 years ago
Thanks, viewing the animation I could understand it!
hdaboliv 2 years ago
this was so helpful. thanx so much
fupopanda 2 years ago
Thanks this was helpful in allowing me to understand the experiment.
YakyuBoy 3 years ago