A mirror is used to produce an image with magnification of \frac{1}{4} If the distance between object and its image is 40 cm , then the focal length of the mirror is \_\_\_\_ [7 Apr 2025 Shift 2]

Ray Optics and Optical Instruments Part 3

Section: Physics

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A mirror is used to produce an image with magnification of ‌

If the distance between object and its image is 40 cm , then the focal length of the mirror is ____

[7 Apr 2025 Shift 2]

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