An object is placed at a distance x1 from the focus on the principal axis of a concave mirror. The image is formed at a distance x2 from the focus. Then the focal length of the mirror is |
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(a) |
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(b) |
x1 x2 |
(c) |
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(d) |
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An object is placed at a distance x1 from the focus on the principal axis of a concave mirror. The image is formed at a distance x2 from the focus. Then the focal length of the mirror is |
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(a) |
|
(b) |
x1 x2 |
(c) |
|
(d) |
|