托福lecture 思维导图样板

关于托福lecture 思维导图，How can it work : muons pass through, dense material, they lose energy. empty space, more muons

Lecture 1 思维导图

• archeology misconception:NOT just digging
  • But an array of high tech tool
  • Rely on particle physics
• Moun detector(interdisciplinary)
  • what is moun:subatomic particles/cosmic rays
  • cosmic rays:protons /outerspace in light speed
    • when collide →small particles
    • small particles are moun
  • moun are energized→pass on earth surface→penetrate deep into the surface →that's property
• use moun to create pictures
  • Mayan pyramid in Central America:buried chambers/rooms inside
  • muon passing through the less dense space
• Q＆A 部分
  • How can it work :
    • muons pass through, dense material, they lose energy.
    • empty space, more muons
      • darker colors in empty spaces
  • Picture?→x-rays image
  • • if darker areas→empty space
  • SO ,we can minimize the damage,even a little damage could result in losing crucial information
• muon detectors that they improved
  • In 1967,
    • no surprises in that experiment but technique worked
  • problem:
    • • so big(doubted its practicality)
    • only scan from muon directly above it but not from the sides and placed underneath
  • didn't take six months to produce an image
• conclusion
  • Muon detectors can also be used in other areas of science.
  • eg:japanese scientist use muons in much more diverse