An object is placed at a distance of 15 cm from a convex lens of focal
length 20 cm. List four characteristics (nature, position, etc.) of the image
formed by the lens.
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u= -15cm
f=20cm
v=?
1/f = 1/v-1/u
1/20=1/v -(-1/15)
1/v=1/20+(-1/15)
1/v= 1/20 - 1/15
1/v= 3-4/60
1/v=-1/60
v= -60cm
m=v/u
m=-60/-15
m=4
image formed is four times the size of the object, on the same side where the object is placed,virtual and erect
f=20cm
v=?
1/f = 1/v-1/u
1/20=1/v -(-1/15)
1/v=1/20+(-1/15)
1/v= 1/20 - 1/15
1/v= 3-4/60
1/v=-1/60
v= -60cm
m=v/u
m=-60/-15
m=4
image formed is four times the size of the object, on the same side where the object is placed,virtual and erect
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