MCQ
Three light sources $A, B$ and $C$ emit equal amount of radiant energy per unit time. The wavelengths emitted by the three sources are $450\ nm, 555\ nm$ and $700\ nm$ respectively. The brightness sensed by an eye for thesources are $X_{A,} X_B$ and $X_C$ respectively. Then,
- A$X_A > X_B, X_C > X_B$
- ✓$X_A > X_B, X_B > X_C$
- C$X_B > X_A, X_B > X_C$
- D$X_B > X_A, X_C > X_B$