On investigation of light from three different stars $A, B$ and $C$ , it was found that in the spectrum of $A$ the intensity of red colour is maximum, in $B$ the intensity of blue colour is maximum and in $C$ the intensity of yellow colour is maximum. From these observations it can be concluded that
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(c) According to Wein’s law, ${\lambda _m}T = $constant
${\lambda _r} > {\lambda _y} > {\lambda _b} \Rightarrow {T_r} < {T_y} < {T_b}$ or ${T_A} < {T_C} < {T_B}$
${\lambda _r} > {\lambda _y} > {\lambda _b} \Rightarrow {T_r} < {T_y} < {T_b}$ or ${T_A} < {T_C} < {T_B}$
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