A thin lens has a focal length of 25.0 cm. (a) Locate the image when the object

1/f = 1/v + 1/u=1/25 a) u=26.8cm 1/25 = 1/26.8 + 1/v 1/v = 0.0026865 v=372.23 cm b) 1/25=1/23.9 + 1/v 1/v= -0.00184 v=-543.48cm

ID: 2302067 • Letter: A

Question

A thin lens has a focal length of 25.0 cm.

(a) Locate the image when the object is placed 26.8 cm in front of the lens. (Enter a negative distance if the image is in front of the lens.)

__________ cm

Is this inverted, upright, enlarged, virtual, reduced, or real? (select all that apply)

(b) Locate the image when an object is placed 23.9 cm in front of the lens. (Enter a negative distance if the image is in front of the lens.

_______________________ cm

Is this inverted, upright, enlarged, virtual, reduced, or real? (select all that apply)

1/f = 1/v + 1/u=1/25

u=26.8cm

1/25 = 1/26.8 + 1/v

1/v = 0.0026865

v=372.23 cm

1/25=1/23.9 + 1/v

1/v= -0.00184

v=-543.48cm

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