– Two thin lenses of focal lengths 15 cm and 10 cm are placed co-axially at a certain distance apart. The combination of lenses produces minimum spherical aberration if the distance between two lenses is …..
A. 5 cm
B. 25 cm
C. 5 cm
D. 5 cm
Answer:C
– Two thin lenses of focal lengths 15 cm and 10 cm are placed co-axially at a certain distance apart. The combination of lenses produces minimum spherical aberration if the distance between two lenses is …..
A. 5 cm B. 25 cm C. 5 cm D. 5 cm