Given, using a 2.5cm Diameter thin lens, which ones are inverted and which ones

Question

Given, using a 2.5cm Diameter thin lens, which ones are inverted and which ones are not?

The (transverse) size of the image I and object O are simply related by (6.8) grating ( 1 mm) and 1 is the spacing of the image of the grating formed on the screen. For o= 2f one has 1-0 but note from the dot on the slide that the image is inverted compared to the object. For o > 2f the image is reduced (demagnified). Verify this property by measuring the im it helpful to measure the width of several grid squares and divide to get an average measurement.

Explanation / Answer

as the spherical lens in question is a convex lens, because for o > 2f image is diminished but for 2f > o > f image is enlarged
all the real images are inverted
so, in the data table give, focal length of the lens is about 15 cm
but all object distances, o > f
so this means all these images are reeal and hence are inverted

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