Questions
When an object is kept at a distance of 30 cm from a concave mirror, the image is formed at a distance of 10 cm. If the object is moved with a speed of 9 cm s-r the speed with which the image moves is
detailed solution
Correct option is B
1u+1v=1f⇒−duu2−dvv2=0 or −dvv2=duu2or dv=−v2u2du=−10×1030×30×9ms−1=−1ms−1Talk to our academic expert!
Similar Questions
A linear object AB is placed along the axis of a concave mirror. The object is moving towards the mirror with speed U. The speed of the image of the point A is 4U and the speed of the image of B is also 4U but in opposite direction. If the centre of the line AB is at a distanc e L from the mirror then find out the length of the object.
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