CUET · PHYSICS · PYQ PAPER 2023
If an object moves towards a convex mirror with a speed of 10 m/s, what would be the speed of image when the object is 49m away? (Given focal length of convex mirror is 1m)
- A \(\frac{1}{250} m / s\)
- B \(\frac{1}{50} m / s\)
- C \(\frac{1}{10} m / s\)
- D \(\frac{1}{49} m / s\)
Answer & Solution
Correct Answer
(A) \(\frac{1}{250} m / s\)
Step-by-step Solution
Detailed explanation
\(v = \left(\frac{1}{f} - \frac{1}{u}\right)^{-1}\) \(v = \left(\frac{1}{1} - \frac{1}{-49}\right)^{-1} = \left(\frac{50}{49}\right)^{-1} = \frac{49}{50} m\) \(v_i = - \left(\frac{v}{u}\right)^2 v_o\)…
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