L3 and L4 of focal lengths 2
In a laboratory four convex lenses L1, L2, L3 and L4 of focal lengths 2,4,6 and 8cm respectively are available. Two of these lenses form a telescope of length 10 cm and magnifying power 4. The objective and eye lenses are respectively :
09
Nov
In a laboratory four convex lenses L1, L2, L3 and L4 of focal lengths 2,4,6 and 8cm respectively are available. Two of these lenses form a telescope of length 10 cm and magnifying power 4. The objective and eye lenses are respectively : 4 6 and 8cm respectively are available. Two of these lenses [...]