Explain the formation of image by a concave mirror when the object is placed at (1)F ,(2) 2F ,(3) infinity
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2
Explanation:
For a concave mirror, when object is at 2f. image is formed at 2f.
Hence, v
1
=−2f for concave mirror
Image formed by concave mirror serves as an object to plane mirror.
Position of plane mirror with respect to concave mirror is d=−f
Hence, position of object for plane mirror is, u
2
=−f, (origin shifted to left)
Hence, position of image for plane mirror is, v
2
=+f
Position of final image wrt the concave mirror is v
3
=v
2
+d=0, (origin shifted to right)
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