plzz answer ny question PLZZZ fast....
Attachments:
Answers
Answered by
1
(a) Focal length will be 10 cm.
reason :
when object is placed at 2F1 then the image is obtained at 2F2
in this case , u and v are equal in magnitude and opposite in sign
so by the data in the table , we can say that radius of curvature is 20 cm , hence focal length will be 10 cm as it is half of the radius of curvature.
(b) the sixth one is incorrect (u=-9 and v=+90)
because in a convex mirror , when an object is placed between the focus and the lens ... then the image is formed on the same side and is virtual .
in this case , object is placed between focus and lens but the image is formed on the other side of the lens (bcause v = +ve) hence it is wrong
Similar questions