Particle-Like Properties of Light (VCE SSCE Physics): Quizzes

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Particle-Like Properties of Light
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What is the photoelectric effect?

Light causes electrons to be ejected

What is the threshold frequency in the photoelectric effect?

Min. frequency to emit photoelectrons

What is the value of 1 electronvolt (eV) in joules?

1.6×10−191.6 \times 10^{-19} J

At constant frequency, how does increasing light intensity affect photoelectrons?

More electrons, same energy

Which formula gives the energy of a photon?

E=hfE = hf

What is the work function (ϕ\phi) of a metal?

Min. energy to release a photoelectron

What is Einstein's photoelectric effect equation?

Ek max=hf−ϕE_{k \text{ max}} = hf - \phi

What is the stopping potential?

Min. voltage to stop most energetic e⁻

Why can't the wave model explain the threshold frequency?

Waves predict any frequency should work

In a graph of Ek maxE_{k \text{ max}} vs frequency, what does the gradient represent?

Planck's constant (hh)

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