Quick questions on Quantum model of light and the photoelectric effect: HSC Physics Module 7

3short 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 einstein's photon hypothesis (1905)?

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Building on Planck's 1900 idea that energy is exchanged in discrete amounts

hf

, Einstein proposed that light itself is made of discrete energy packets:

What is threshold frequency?

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The minimum frequency that can eject any electron is the one where

K_{\max} = 0

What is planck's constant?

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h = 6.626 \times 10^{-34}

J s is the universal constant relating frequency to energy quantum. It also appears in:

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