A positive lens has a focal length of 39 cm. An object is located 84 cm...
A positive lens has a focal length of 39 cm. An object is located 84 cm from the lens. Trace three rays from the top of the object to confirm your results. (Show Diagram Clearly)
Homework Answers
given that
focal length f = 39 cm
object distance d0 = 84 cm
from the relation
1/f = 1/d0+1/di
1/di = 1/f-1/d0
image distance di = d0*f/(do-f)
di = 84*39/(84-39)
di = 72.8 cm
ray diagram:
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