An object is placed at a distance of 25cm from a spherical mirror and its image is formed behind the mirror at a distance of 5cm. find focal length. Is it concave or convex mirror?
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An object is placed at a distance of 25cm from a spherical mirror and its image is formed behind the mirror at a distance of 5cm. find focal length. Is it concave or convex mirror?
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Answer:
Explanation:
1/v+1/u=1/f
in this v is distace of image from pole and u is the distance of object from the pole
1/5+(-1/25)=1/f
5-1/25=1/f
:-6.25cm
And it is convex mirror because it has +ve value
Thank you