A diverging lens has a focal length of 15.0 c m . For each of two objects locate

Question

A diverging lens has a focal length of 15.0cm . For each of two objects located to the left of the lens, one at a distance of s1 = 22.0cm  and the other at a distance of s2 = 5.50cm

a)determine the image position  

       s1=_____cm

       s2=_____cm

b) determine the magnification

      s1=_____cm

      s2=_____cm

c)

    

Both images are real. The image of the first object is real and the image of the second object virtual. The image of the first object is virtual and the image of the second object real. Both images are virtual.

Explanation / Answer

a)
f = -15 cm
s1 = 22cm

1/s1 + 1/s1' = 1/f

1/s1' = 1/f - 1/s1

s1' = -8.92 cm

s2 = 5.5cm

1/s2 + 1/s2' = 1/f

1/s2' = 1/f - 1/s2

s2' = -4.024 cm


b) Both images are virtual.

d) Both images are erect.

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