The unit of Wein's constant is

m K

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m^{- 1} K

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m^{2} K^{- 1}

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m K^{- 1}

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Solution

The correct option is B $m K$
We know that from Wein's displacement law $λ_{m a x} T = c o n s t a n t$
where units are as follows
$λ = m e t r e$ -----(WAVELENGTH)
$T = k e l v i n$ --------(TEMPERATURE)
So, finally we get the unit of $W e i n^{'} s c o n s t a n t = m K$

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