– The condition for an achromatic combination of two lenses in contact is ….
A. The lenses must be made up of same type of glass and one lens must be converging and the other diverging
B. The lenses must be made from different types of glasses and one lens must be converging and other diverging
C. The lenses must be made from different types of glasses and both lenses may be converging or diverging
D. None of these
Answer:B
– The condition for an achromatic combination of two lenses in contact is ….
A. The lenses must be made up of same type of glass and one lens must be converging and the other diverging B. The lenses must be made from different types of glasses and one lens must be converging and other diverging C. The lenses must be made from different types of glasses and both lenses may be converging or diverging D. None of these