An image of 10 cm is formed from a convex lens of focal length 15 cm .How far is the object places from the lens .Draw a ray diagram and find it's nature and magnification of the image?
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1
Answer:
image ddistnce =-10cm
focal length=-15cm
object distance=?
since 1/v -1/u = 1/f
1/u =1/v-1/f
1/u=1/-10 -1/-15 =-1/10+1/15
1/u=-3+2/30 =1/-30
u=-30
m=v/u
m=-10/-30 =1/3 =+0.33
image is virtual and erect .The image is one third of the size of the object.
Answered by
0
Answer:
f= -15 cm, v= -10 cm
1/v -1/u = 1/f
1/u = 1/15 – 1/10 = -1/30
u = -30 cm.
Ray diagram as follows:
Attachments:
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