A-Level Physics 3.2-Quantum Physics
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10 Terms
What is photoelectric effect. [1 mark]
Photon has enough energy to emit electron from metal surface.
Define threshold frequency. [1 mark]
Minimum frequency of photon needed to emit electron from metal surface.
Defined work function. [1 mark]
Minimum photon energy needed to emit electron from metal surface.
Explain how flowescent tube create white light. [4 marks]
Free electron accelerated by high voltage.
Collide with electron in mercury vapour which excited to higher energy level.
UV photon emitted and absorbed by the coating.
Different frequency of visible light combine to white light.
Give one piece of evidence to demonstrate that electrons have particle properties. [1 mark]
Path deflect s in magnetic field.
Give one piece of evidence to demonstrate that electrons have wave properties. [1 mark]
Diffraction of electron.
Give one piece of evidence to demonstrate that light have particle properties. [1 mark]
Diffraction of light.
Give one piece of evidence to demonstrate that light have wave properties. [1 mark]
Photoelectric effect.
Explain what is meant by validated evidence. [2 marks]
Experiment need to be performed.
Result of experiment need to be proved.
Note 
Flashcards (44)