If the velocity and wavelength of light in air is Va and λa and that in water is Va and λw, then the refractive index of water is,
A. \(\frac { { V }_{ w } }{ { V }_{ a } } \)
B. \(\frac { { V }_{ a } }{ { V }_{ w } } \)
C. \(\frac { { λ }_{ w } }{ { λ }_{ a } } \)
D. \(\frac { { V }_{ a }{ \lambda } }{ { V }_{ w }{ \lambda }_{ w } } \)
Answer:B
If the velocity and wavelength of light in air is Va and λa and that in water is Va and λw, then the refractive index of water is,
A. \(\frac { { V }_{ w } }{ { V }_{ a } } \) B. \(\frac { { V }_{ a } }{ { V }_{ w } } \) C. \(\frac { { λ }_{ w } }{ { λ }_{ a } } \) D. \(\frac { { V }_{ a }{ \lambda } }{ { V }_{ w }{ \lambda }_{ w } } \)