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VICPhysicsQuick questions

Unit 4: How have new ideas and ways of thinking developed our understanding of the physical world?

Quick questions on Photoelectric effect and the photon model of light: VCE Physics Unit 4

4short 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 sign of V0V_0?
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The stopping voltage is positive (a magnitude). The plot V0V_0 vs ff has a positive gradient h/eh/e and negative yy-intercept −ϕ/e-\phi/e.
What is q1?
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State the photoelectric equation and define each term. [2 marks]
What is q2?
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Light of wavelength 400400 nm shines on a metal with work function 2.02.0 eV. Calculate (a) the photon energy in eV, and (b) the stopping voltage. [4 marks]
What is q3?
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Refer to the Synchrotron photoelectron spectroscopy example. (a) Calculate the maximum photoelectron KE for 5050 eV photons on copper (ϕ=4.65\phi = 4.65 eV). (b) Determine the stopping voltage.

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