An object ' \(o\) ' is placed at a distance of \(100\,cm\) in front of a concave mirror of radius of curvature \(200\,cm\) as shown in the figure. The object starts moving towards the mirror at a speed \(2\,cm / s\). The position of the image from the mirror after \(10\,s\) will be at ...... \(cm\).

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Answer & Solution

Correct Answer

(D) \(400\)

Step-by-step Solution

Detailed explanation

After \(10\,sec\).

\(u =-80\,cm\)

\(f =-100\,cm\)

\(\frac{1}{ v }+\frac{1}{ u }=\frac{1}{ f }\)

\(v =400\,cm\)

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