QCEVault

Quantum theory — Question 38

Original QCE Vault practice · 1 mark

Q38 · Practice questionSimple familiar1 mark

QUESTION 38

Two idealised blackbody curves are shown. Curve T1T_1 has a shorter peak wavelength than curve T2T_2. Which statement is correct?
Two idealised blackbody spectra
(A)
T1<T2T_1<T_2
(B)
T1=T2T_1=T_2
(C)
T1>T2T_1>T_2
(D)
Temperature cannot be inferred from peak wavelength.
Question linkSyllabus coverage

Related questions

  1. Q39 · Original practice · 1 mark
    What is the energy of a photon of wavelength 500 nm500\,\text{nm}?
    Quantum theory
  2. Q40 · Original practice · 1 mark
    Photons of energy 6.0 eV6.0\,\text{eV} strike a metal with work function 2.2 eV2.2\,\text{eV}. The maximum photoelectron kinetic energy is
    Quantum theory
  3. Q41 · Original practice · 1 mark
    A metal has work function 2.50 eV2.50\,\text{eV}. Its threshold frequency is closest to
    Quantum theory
  4. Q42 · Original practice · 1 mark
    For a graph of maximum photoelectron kinetic energy against incident frequency, the gradient is equal to
    Quantum theory