- #1
jwxie
- 281
- 0
Homework Statement
Find focal length for meniscus convex (3)
Given r = 15, and n = 1.5
Homework Equations
Lens maker's equation
The Attempt at a Solution
I can find the rest except #3 and #6 (they are opposite sign of each other)
I had (1/r1 - 1/r2) gives zero... which is wrong...
I can solve the rest, so I don't really know what else to show... (so I am sorry for not showing any work...)
I spent two hours literally trying to solve this and no luck
Can anyone please help me? Thanks..