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Define the photoelectric effect.
The emission of electrons from a metal surface when light shines on it.
What is a photon?
A discrete packet of light energy.
Define work function (ฮฆ).
The minimum energy needed to remove an electron from a metal surface.
What is threshold frequency ($f_0$)?
The minimum frequency of light required to eject electrons from a metal surface.
Define $K_{max}$ in the context of the photoelectric effect.
The maximum kinetic energy of an emitted electron.
What is the effect of increasing the frequency of light above the threshold frequency in the photoelectric effect?
It increases the maximum kinetic energy ($K_{max}$) of the emitted electrons.
What is the effect of increasing the intensity of light on a metal surface above the threshold frequency?
It increases the number of emitted electrons, but not their kinetic energy.
What happens if the photon energy ($hf$) is less than the work function (ฮฆ)?
No electrons are emitted, regardless of the light's intensity.
What is the effect of using a metal with a higher work function in the photoelectric effect?
A higher threshold frequency ($f_0$) is required for electron emission.
What is the effect of shining light on a metal surface?
Electrons are emitted if the light's frequency is above the threshold frequency.
Define Planck's constant.
The proportionality constant (h) between the energy of a photon and its frequency, approximately $6.63 imes 10^{-34} Js$.
Define quantized energy.
Energy that exists in discrete packets or quanta, rather than a continuous range.