For spherical mirrors of small apertures, the radius of curvature is found to be |
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(a) |
equal the focal length |
(b) |
twice the focal length |
(c) |
thrice the focal length |
(d) |
there is no relation between them |
For spherical mirrors of small apertures, the radius of curvature is found to be |
|||
(a) |
equal the focal length |
(b) |
twice the focal length |
(c) |
thrice the focal length |
(d) |
there is no relation between them |
Two painters are working from a wooden board 5 m long suspended from the top of a building by two ropes attached to the ends of the plank. Either rope can withstand a maximum tension of 1040 N. Painter |
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a) |
|
b) |
|
c) |
|
d) |
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