– The refractive index of a material of the lens is
A. Greater for violet rays than that of red rays
B. Less for violet rays than that for red rays
C. Equal for all colors of rays
D. Equal for all colors except violet
Answer:A
– The refractive index of a material of the lens is
A. Greater for violet rays than that of red rays B. Less for violet rays than that for red rays C. Equal for all colors of rays D. Equal for all colors except violet