Q20 · 2024 · Paper 1Simple familiar1 mark
QUESTION 20
Identify the defining feature of a black body.
(A)
All frequencies of electromagnetic radiation are absorbed and emitted.
(B)
Light with two wavelength peaks is emitted at a specific temperature.
(C)
Electrons are emitted in the presence of all frequencies of light.
(D)
The peak of its spectral output does not vary with temperature. Back cover
WORKED SOLUTION
1 markAnswer A
ANSWER
A
Worked solution
An ideal black body absorbs all incident electromagnetic radiation and emits a continuous spectrum whose shape depends on temperature. Option A.
Selects option A.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.