Describe the nature of the image formed when the object is placed at the distance of 20 cm from a concave mirror of focal length 10 cm.
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Answer:
The image formed is real and inverted.
The image has the same size as that of the object.
Explanation:
u = - 20 cm
f = - 10 cm
Mirror formulae : 1/v + 1/u = 1/f
1/v = 1/f - 1/u
= - 1/10 + 1/20
= - 1/20
v = - 20 cm
Magnification : m = - v/u
m = 20 / -20
= -1
Since magnification is negative, the image formed is real and inverted.
The image has the same size as that of the object.
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