Concept Simulation 26.4 provides the option of exploring the ray diagram that ap
ID: 1263244 • Letter: C
Question
Concept Simulation 26.4 provides the option of exploring the ray diagram that applies to this problem. The distance between an object and its image formed by a diverging lens is 8.50 cm. The focal length of the lens is -3.90 cm. Find (a) the image distance and (b) the object distance.Concept Simulation 26.4 provides the option of exploring the ray diagram that applies to this problem. The distance between an object and its image formed by a diverging lens is 8.50 cm. The focal length of the lens is -3.90 cm. Find (a) the image distance and (b) the object distance.
Explanation / Answer
a)
let the distance of object = do
distance of image = di
focal length = f = -3.90 cm
it is given that do - di = 8.50 cm
so di = do - 8.5
using the lens equation ::
1/f = 1/do + 1/di
1/(-3.90 cm) = 1/do + 1/(do - 8.5) ( since di = do - 8.5 )
do = 6.12 cm
b) it is given that
di = do - 8.5
di = 6.12 - 8.5 = -2.38 cm
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