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A Point object is moving uniformly towards the pole of a concave mirror of focal length \( 25 \mathrm{~cm} \)
along its axis as shown below. The speed of the object is \( 1 \mathrm{~ms}^{-1} \). At \( \mathrm{t}=0 \), the distance of the
object from the mirror is \( 50 \mathrm{~cm} \). The average velocity of theimage formed by the mirror
between time \( t=0 \) and \( t=0.25 \mathrm{~s} \) is
Options:
along its axis as shown below. The speed of the object is \( 1 \mathrm{~ms}^{-1} \). At \( \mathrm{t}=0 \), the distance of the
object from the mirror is \( 50 \mathrm{~cm} \). The average velocity of theimage formed by the mirror
between time \( t=0 \) and \( t=0.25 \mathrm{~s} \) is
Solution:
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Verified Answer
The correct answer is:
infinity
Focal length $=25 \mathrm{~cm}$
$U_{f}=25 \mathrm{~cm}$
$V_{f}=\infty$
$ < \mathrm{V}>=\frac{V_{f}-V_{i}}{\Delta t}=\infty$
$U_{f}=25 \mathrm{~cm}$
$V_{f}=\infty$
$ < \mathrm{V}>=\frac{V_{f}-V_{i}}{\Delta t}=\infty$
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