Question

Please help me to find the answers.............,......An object is placed 18cm is in front of a spherical mirror. If the mage is formed at 4cm to the right of the mirror , calculate its focal length . Is the mirror concave or convex . What is the nature of the image ? What is the radius of curvature of the mirror?​

Answer 1

Explanation:

as per the given statement,

the image is forming on the other side of spherical mirror and also the image is diminished,thus the spherical mirror will be the convex mirror,

and nature of the image will be virtual image

also the mirror formula is

1/v + 1/u = 1/f

1/4 + 1/-18=1/f

1/f= 7/36

focal length will be 36/7

and radius is given by 2f

thus radius will be 2×36/7= 72/7 or 10.28

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