complete the Ray diagram
find the nature,position and side
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As the object is between pole and focus of a concave mirror, the image is formed back of the mirror and it is magnified.
The mage is virtual, erect and magnified.
Here,
u = -10
f = -20
Mirror formula:
1/v + 1/u = 1/f
1/v - 1/10 = -1/20
1/v = 1/10 - 1/20 = 1/20
1/v = 1/20
v = 20cm
So the image is formed at a distance 20cm back of the mirror.
Magnification (m) = -v/u = -20/-10 = 2
So the image size is twice the size of the object and image is erect.
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