- #1

jlmac2001

- 75

- 0

my answer:

1/f = (n-1)(1/R1-1/R2)

1/f = (1.5-1)(1/20-1/40)

1/f = .5(.025)

f = 1/.0125 = 80cm (convering lens because f is positive)

Mt=-f/x0=-80/40=-2cm (Inverted image because Mt is negative)

Did I use the correct equations?