ferrofluids
Explanation
The Joke
A person at what appears to be a party or social gathering proposes a seemingly scientific idea: selectively binding ferromagnetic particles to certain people, then using a powerful magnet to move them into a separate region. The caption below reads: "Thanks to chemistry, we discovered the most subtle way to remove unwanted guests."
The joke is that the speaker is using elaborate scientific language to describe what is essentially kicking annoying people out of a party. Rather than simply asking unwanted guests to leave, they have devised a hilariously over-engineered chemistry/physics solution to physically drag them away with magnets.
The Humor
The humor works on multiple levels. First, there is the absurd contrast between the mundane social problem (unwanted party guests) and the wildly overcomplicated scientific solution (ferromagnetic particle binding and magnetic separation). This is a classic SMBC trope where scientific knowledge is applied to everyday situations in ridiculous ways.
Second, the word "subtle" in the caption is deeply ironic -- physically dragging people across a room with magnets would be anything but subtle. The people in the background appear to be laughing, suggesting they find the whole scheme amusing rather than practical.
References
- Ferrofluids are real liquids that become strongly magnetized in the presence of a magnetic field. They are made of nanoscale ferromagnetic particles suspended in a carrier fluid, which is exactly the kind of technology being absurdly repurposed here.
- The concept of magnetic separation is a real technique used in chemistry and materials science to isolate magnetic materials from non-magnetic ones.