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← Topic 22 overviewTOPIC 22 ASSESSMENT

Quantum physics

CIE-style questions assess photons, photoelectric emission, wave–particle duality, de Broglie wavelength and atomic spectra.

Objective question 1

Photon energy is:

Objective question 2

Below the threshold frequency, increasing intensity causes:

Objective question 3

Einstein's photoelectric equation is:

Objective question 4

The de Broglie wavelength is:

Objective question 5

An emission line is produced by an electron transition:

Structured question 1

Calculate photon energy for frequency 6.0 × 10¹⁴ Hz using h = 6.63 × 10⁻³⁴ J s.

Structured question 2

A metal has work function 2.1 eV and receives 3.0 eV photons. Calculate maximum kinetic energy in eV.

Structured question 3

Calculate de Broglie wavelength of an electron moving at 2.0 × 10⁶ m s⁻¹. Use h = 6.63 × 10⁻³⁴ and m = 9.11 × 10⁻³¹.