Wave Particle Duality

Wave -particle duality is supported by...

• electrons behaving as particles with ordinary matter

• electrons behaving as waves when travelling through space

• the photo electric effect

• all of the above

Tags

NGSS.HS-PS4-3

If waves can behave like particles, then particles can behave like a wave. This is the idea behind...

• Quantization of Energy

• Photoelectric Effect

• Compton Effect

• deBroglie Waves

• Uncertainty Principle

Tags

NGSS.HS-PS4-3

A metal surface is struck with light of λ = 400 nm, releasing a stream of electrons. If the 400 nm light is replaced by λ= 300 nm light of the same intensity, what is the result?

• More electrons are emitted in a given time interval

• Fewer electrons are emitted in a given time interval

• Emitted electrons are more energetic

• Emitted electrons are less energetic

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

A metal surface is struck with light of λ = 400 nm, releasing a stream of electrons. If the light intensity is increased (without changing λ ), what is the result?

• More electrons are emitted in a given time interval

• Fewer electrons are emitted in a given time interval

• Emitted electrons are more energetic

• Emitted electrons are less energetic

Tags

NGSS.HS-PS4-3

What is the dual nature of light?

• Light can be both dim and bright

• Light behaves as a particle and a wave

• Light has both speed and location

• Light has 2 predominant colors

Tags

NGSS.HS-PS4-3

Electromagnetic radiation can sometimes behave like _______ and at other times like __________. Choose two.

• a wave

• a particle

• gravity

• matter

Tags

NGSS.HS-PS4-3

Einstein and Planck recognized the dual nature of light when studying the energy of light. Who recognized that this same dual nature could be applied to matter also?

• Einstein and Planck

• Bohr

• deBroglie

• Rutherford

How can light (radiation) best be described?

• by using wavelengths only

• as having different frequencies

• something that can be measured

• as having properties of both a wave and a particle

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

De Broglie equation

• relates the momentum of a mass to its wavelength

• relates the energy of a mass to its wavelength

• relates the frequency of a mass to its wavelength

• relates the work function of a mass to its wavelength

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Planck's constant can be found ...

• energy of a particle x speed of light / wavelength

• energy of a particle x speed of light / frequency of light

• energy of a particle x wavelength / speed of light

• slope of the cut-off voltage vs frequency graph