A concave lens has a focal length of 20 cm .At what distance should an object be placed so that an image is formed at a distance of 10 cm from the optical centre? What is the nature and size of the image ?
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Answer:
size - same as image
Nature- Real and Inverted
Explanation:
if focal length is 20 cm ,then focus is at 10 cm.
If object is at focus than image is always formed at focus and of same size but with opposite nature.
image is at 10 cm then object is also at 10 cm.
lense formula -1/f = 1 /v - 1/u
f - focal length
v- distance of image
u - distance of object
Thanks...
Answered by
0
Answer:
Explanation:
Nature- Real and Inverted
if focal length is 20 cm ,then focus is at 10 cm.
If object is at focus than image is always formed at focus and of same size but with opposite nature.
image is at 10 cm then object is also at 10 cm.
lense formula -1/f = 1 /v - 1/u
f - focal length
v- distance of image
u - distance of object
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