smoke

Scientific concepts / nature phenomena presented

• Chemical staining/dyeing by smoke particles: Smoke (from a smoke bomb) carries color-forming substances/condensable materials that can deposit on surfaces. In this case, the deposits produce a visible color change on white shoes.
• Aerosol formation and dispersion in a confined space: When released inside a closed plastic box, the smoke rapidly fills the container and becomes dense enough to obscure visibility.
• Time-dependent deposition / emission:
  • Smoke output changes over time:
    • ~1 minute: heavy smoke persists; the box is filled.
    • ~5 minutes: less smoke, but darker coloration.
    • ~10 minutes: near-black smoke density inside the box.
    • ~15 minutes: smoke release stops.
• Health hazard of toxic smoke: The experiment includes a warning that the smoke is toxic and not to be inhaled, reflecting real-world risks from smoke bomb combustion products and particulate exposure.

Methodology / procedure (outlined)

1. Buy a smoke bomb.
2. Prepare white shoes for dyeing.
3. Place the shoes in a plastic box.
4. Wear protective gear.
5. Release the smoke bomb by pulling the safety pin.
6. Observe and time the smoke evolution:
   • ~1 minute: box filled; shoes not visible.
   • ~5 minutes: color darkens; smoke output decreases.
   • ~10 minutes: smoke becomes almost black.
   • ~15 minutes: smoke stops coming out.
7. Open the box and assess the results:
   • Shoes dyed bright red; final appearance evaluated.

Key discovery / result

• Smoke can dye colors: The experiment demonstrates that smoke particles from a smoke bomb can deposit onto a surface and cause a strong, visible color change—white shoes → bright red shoes.

Researchers / sources featured

• No specific researchers or external sources are named in the provided subtitles.