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Wien's displacement law expresses a relation between

Asked in CBSE AIPMT 2002 · Wien's law and emissivity

• (1) the wavelength corresponding to maximum energy and the temperature
• (2) radiation energy and wavelength
• (3) temperature and wavelength
• (4) the colour of light and the temperature

Step-by-step solution

Why the other options are wrong

• (2) comes from that describes the shape of the black body curve, which is Planck's law; Wien's law picks out one point on that curve rather than describing the whole of it
• (3) comes from too loose: Wien's law does not tie the temperature to any wavelength at all, only to the one wavelength at which the emission is strongest
• (4) comes from the change of colour is a consequence of the law, not the relation the law states; the law itself is written between λₘ and T

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