Two coherent radio transmitters, T1 T_1\,T1 and T2T_2T2, emit waves in phase. A receiver at point R R\,R detects a minimum of intensity due to destructive interference of the waves.
The distance from T1 T_1\,T1 to R R\,R is 1.25 m and the distance from T2 T_2\,T2 to R R\,R is 2.45 m. The radio waves have wavelength λ\lambdaλ.
Which value of λ \lambda\,λ is not possible?
0.48 m0.48\text{ m}0.48 m
0.80 m0.80\text{ m}0.80 m
1.20 m1.20\text{ m}1.20 m
2.40 m2.40\text{ m}2.40 m
