You place a 7.39-mm-high chocolate chip on the axis of and 13.1 cm from a lens w

Question

You place a 7.39-mm-high chocolate chip on the axis of and 13.1 cm from a lens with focal length 5.45 cm. If it can be determined, is the chocolate chip's image real or virtual?

You place a 7.39-mm-high chocolate chip on the axis of and 13.1 cm from a lens with focal length 5.45 cm. If it can be determined, is the chocolate chip's image real or virtual? O Virtual Cannot be determined O Real How high is the image (expressed as a positveq How high is the image (expressed as a positive quantitiy)? Number If it can be determined, is the image upright or inverted with respect to the real thing? O Inverted Cannot be determined O Cannot be determined O Upright

Explanation / Answer

-object distance = u=13.1cm

Focal length = f=5.45cm

Let image distance be v

(1/v)+(1/u)=1/f

(1/v)+(1/13.1) = (1/5.45)

v = 9.33cm

The image formed is real because v is positive

-magnification = v/u = 9.33/13.1 = 0.712

Image height = 7.39*0.712 = 5.26mm

-The image is inverted with repect to real thing

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