- #1
songoku
- 2,340
- 340
Homework Statement
A diverging lens with focus 5 cm is placed on a filament. Find the distance between the lens and the filament
Homework Equations
[tex]\frac{1}{f}=\frac{1}{di}+\frac{1}{d}[/tex]
The Attempt at a Solution
Focus of diverging lens is negative so, f = -5 cm. I think the question is asking about di. What is d ? Can it be infinity because the filament gives light until far enough distance ?
Thanks
Last edited: