CUET · PHYSICS · PYQ PAPER 2023
In a concave mirror, an object is placed at a distance \( x \) from the focus and the image is formed at a distance \( y \) from the focus. What is the focal length of the mirror?
- A \( (xy)^{1/2} \)
- B \( \frac{x+y}{2} \)
- C \( xy^{-1} \)
- D \( xy \)
Answer & Solution
Correct Answer
(A) \( (xy)^{1/2} \)
Step-by-step Solution
Detailed explanation
\( f^2 = xy \) \( f = (xy)^{1/2} \)
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