Back to the full dot-point answer
VICPhysicsQuick questions
Unit 4: How have new ideas and ways of thinking developed our understanding of the physical world?
Quick questions on Wave-particle duality: VCE Physics Unit 4
7short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is light as a wave?Show answer
The wave model is the working description for the vast majority of classical optics.
What is light as a particle?Show answer
The particle (photon) model is the working description when light interacts with matter through individual quantum events.
What is matter as a particle?Show answer
The particle model is the working description for macroscopic motion and for charged-particle ballistics.
What is matter as a wave?Show answer
The wave model becomes essential when the de Broglie wavelength is comparable to the relevant geometric scale (atomic-spacing crystals, atomic orbits).
What is q1?Show answer
State two pieces of evidence that light has both wave and particle properties. [2 marks]
What is q2?Show answer
Calculate (a) the de Broglie wavelength of a keV electron, and (b) the photon energy of light with the same wavelength. [4 marks]
What is q3?Show answer
Refer to Bio21 cryo-EM. (a) Outline why electrons are used rather than light for imaging proteins. (b) Calculate the de Broglie wavelength of a keV electron (use relativistic for ultrarelativistic estimate).
Have a question we have not covered?
This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.