Question

1.

Double-slit experiment, in which instead of using a_____ , one uses the _____ .

force; wave

wave; force

light source; electron gun

Plasma: Lithium

2.

Which of the following statements is right?

Quantum physics must reduce to the classical physic when applied to macroscopic systems.

A particle’s position and its momentum can be both detected at absolute zero degree.

Quantum mechanics experiments are not successful every time because it is based on probability.

Quantum mechanics makes the possibility of time travel.

3.

Why is quantum mechanics used?

To destroy things

To discover new atoms

To read.

To explain microscopic phenomena

Answer 1

1) Instead of light waves, one uses an electron gun to investigate electrons as to whether they behave like particles or waves.

2) a) TRUE, in the macroscopic limit quantum mechanics must reduce to classical physics.

b) FALSE, uncertainty principle does not allow that to happen.

c) FALSE, experiments are successful but the outcomes are probabilistic, that it the outcome form a histogram.

d) FALSE, quantum mechanics is not a theory that says anything about the fundamental nature of time.

3) Quantum mechanics is used to explaining microscopic phenomena since classical physics fails to do so.