A rod of length 12 cm is placed horizontally along the optical axis of a concave mirror of focal length 24 cm. The end near to the pole is at the centre of curvature. Find the length of image of rod.
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Home / Tell me? A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that its end closer to the pole is 20 cm away from the mirror. The length of the image is:
A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that its end closer to the pole is 20 cm away from the mirror. The length of the image is:
Option 1) 15 cm Option 2) 2.5 cm Option 3) 5 cm Option 4) 10 cm
Answers (1)
D divya.saini
Answered 2 years, 2 months ago
As we discussed in
Consider point A:
From mirror formula
Hence image will form at A itself.
For B
size of image =
= 5 cm.
Option 1)
15 cm
This option is incorrect.
Option 2)
2.5 cm
This option is incorrect.
Option 3)
5 cm
This option is correct.
Option 4)
10 cm
This option is incorrect.
Explanation:
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Answer:
not sure but you should check your textbook
Explanation: