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Ray Optics and Optical Instruments — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsRay Optics and Optical Instruments2 Marks
Question
Write the formula of spherical mirror and explain it.
✓

Answer

$\frac{1}{f}=\frac{1}{v}+\frac{1}{u}$, where $f, v$ and $u$ are the focal length, distance of the image and distance of the object respectively. $f$ is half of the radius of curvature $R$. For a concave mirror, $f$ is negative and for a convex mirror, $f$ is positive.

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