Where is the image located when an object is placed 30 cm from a convex mirror with a focal length of 10 cm? *
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Where is the image located when an object is placed 30 cm from a convex mirror with a focal length of 10 cm? *
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Answer :
Distance of object = 30cm
Focal length = 10cm
Type of mirror : convex
We have to find position of image
★ Focal length of convex mirror is taken positive and that of concave mirror is taken negative.
Position of image can be calculated by using mirror formula which is given by
u denotes distance of object
v denotes distance of image
f denotes focal length
By substituting the given values,
➙ 1/u + 1/v = 1/f
➙ 1/(-30) + 1/v = 1/10
➙ 1/v = 1/10 + 1/30
➙ 1/v = 4/30
➙ v = 7.5 cm
★ Position and nature of image :
Answer:
Using the Real Is Positive convention:
u=+30 and f=-10
1/u+1/v=1/f
1/30 + 1/v = -1/10
1/v = -1/10 - 1/30 = -3/30 - 1/30 = -4/30
v = -30/4 = -7.5 cm meaning virtual and erect. And quarter the size of the object .