\({\lambda _m}T = constant\)              \(...(i)\)

For star \(P,\) instensity of violet colour is maximum

For star \(Q,\) instensity of red colour is maximum.

For star \(R,\) intensity of green colour is maximum.

\(Also,{\lambda _r} > {\lambda _g} > {\lambda _v}\)

Using equation \((i)\), \({T_r} < {T_g} < {T_v}\)

               \({T_Q} < {T_R} < {T_P}\)