Heisenberg Uncertainty Principle

Question 1

Define the Heisenberg Uncertainty Principle [1 mark]

Answer 1

We can’t precisely determine the momentum* and *position of an electron at the same time.

Question 2

How does low energy detection techniques affect electrons? [1 mark]

Answer 2

Position becomes uncertain

Question 3

How do high energy detection techniques affect electrons? [1 mark]

Answer 3

momentum becomes uncertain

Question 4

Recite Heisenberg’s Uncertainty formula [1 mark]

Answer 4

Question 5

(Laser point experiment) narrowing the slit decreases the value of X.

1. What happens to the value of P when X falls below a certain value?
2. What’s the result of X falling below critical value?

[2 marks]

Answer 5

1. P increases in value causing electrons to move to the left and right.
2. The laser point widens despite the slit narrowing.