A tungsten filament in an incandescent lamp is operated steadily at a temperature of

PHYSICS · Multi-part · AP · Physics 2: Algebra-based · Modern Physics · Modern Physics

Problem

2900\,\text{K}

. The constant

b

in Wien’s displacement relation has a value

2.9\times10^{-3}\,\text{m\,K}

. The speed of light is

3.0\times10^{8}\,\text{m\,s}^{-1}

. (i) Calculate the wavelength corresponding to maximum emissive power of the filament. Express your answer in nanometres. (ii) Determine the frequency that corresponds to the wavelength obtained in part (i).

Related theory

Electromagnetic Spectrum
Electromagnetic Waves
Heat Transfer
Radiation laws
The greenhouse effect
Black body radiation
Waves
Blackbody radiation

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