a lens forms the image of an object placed 15 cm from it, at a distance of 60 cm in front of it. find focal length, magnification
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Answer:
Object distance ,u=-15 cm
Image distance ,v=-60 cm
(i)
Lens formula is
1/f=1/v-1/u
1/f=1/-60-1/-15=1/f
1/f=1/15-1/60=3/60
f=20 cm
(ii)
For a lens , magnification is
m=v/u
m=-60/-15
m=+4
(iii)The nature of the image is erect,virtual and magnified
Answered by
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Answer:
HEY STUDENT! YOUR ANSWER IS HERE
Explanation:
Object distance ,u=-15 cm
Image distance ,v=-60 cm
(i)
Lens formula is
1/f=1/v-1/u
1/f=1/-60-1/-15=1/f
1/f=1/15-1/60=3/60
f=20 cm
(ii)
For a lens , magnification is
m=v/u
m=-60/-15
m=+4
(iii)The nature of the image is erect,virtual and magnified
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