What will be the nature of the image formed in a convex mirror and in a concave mirror each of focal length 20 cm and object is placed at the distance of 10 cm.
Answers
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1
the image is virtual and erect.
Explanation:
Answered by
2
Convex - diminished, virtual and erect.
Concave - enlarged, virtual and erect.
Explanation:
Convex mirror:
u (object distance) = -20cm ( negative sign due to presence of object opposite to the direction of rays)
f(focal length) =+25cm (convex mirror has always positive focal length)
1/f=1/v+1/u
1/25=-1/20+1/v
1/25+1/20=1/v
(4+5)/100=1/v
9/100=1/v
v=100/9
v=11.111cm (image distance)
Position of the image is behind the mirror as v is positive. Image is diminished, virtual and erect.
Concave Mirror:
As the object is placed between the pole and focus, a virtual image will be formed behind the mirror. The image will be enlarged, virtual and erect.
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