Spherometer

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🔍 Spherometer

A Spherometer is a precision instrument used to measure the radius of curvature of spherical surfaces, such as lenses, mirrors, or concave/convex surfaces. It works based on the micrometer screw principle and is commonly used in optics and engineering physics labs.

🧪 Key Features:

Design: Tripod base with three fixed legs and a central screw
Material: Brass, stainless steel, or aluminum alloy
Main Parts:
- Three outer legs forming an equilateral triangle
- Central screw with circular scale and pitch markings
- Flat base for surface stability
Least Count: Typically 0.01 mm

📚 Applications:

Measuring the radius of curvature of convex or concave glass surfaces
Used in lens manufacturing, optical testing, and surface profiling
Essential in CBSE/ICSE/State board practicals and college-level optics experiments
Demonstrates the use of pitch, least count, and geometric calculations