Uncertainty principle

High school (ages 12+)
Science & Technology

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Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/uncertainty-principle

1. Who discovered Uncertainty principle?
2. What is the complementary variables?
3. What is the related field?
4. Why can’t we know both where a tiny particle is and how fast it’s moving at the same time?
5. How does the Uncertainty Principle help us build cool gadgets like lasers or computers?

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. Who discovered Uncertainty principle?1927 by Werner Heisenberg
2. What is the complementary variables?Pairs like position-momentum and energy-time cannot be simultaneously known with arbitrary precision
3. What is the related field?Quantum mechanics, quantum field theory, and quantum information science
4. Why can’t we know both where a tiny particle is and how fast it’s moving at the same time?Because measuring a particle’s position changes its speed, and measuring its speed changes its position. The more we try to pin one down, the fuzzier the other becomes.
5. How does the Uncertainty Principle help us build cool gadgets like lasers or computers?It lets us use quantum tricks like tunneling, which helps microscopes see single atoms, and it’s behind the tiny parts in computers and lasers that make them work.

Conjugate Variables: Pairs of physical properties in quantum mechanics that have a fundamental limit on their simultaneous precise measurement.
Planck's Constant (ħ): A fundamental constant in quantum mechanics, representing the smallest unit of action.
Quantum Tunneling: A quantum mechanical phenomenon where a particle can pass through a potential energy barrier that it classically could not overcome.
Vacuum Fluctuations: Temporary changes in the amount of energy in a point in space, arising from the uncertainty principle.