A Spirit Level (also known as a Bubble Level) is a tool used to determine whether a surface is perfectly horizontal or vertical. It contains a sealed tube filled with liquid and a bubble that aligns between marked lines when the surface is level.
Material: Durable plastic or metal body with transparent vial
Vial: Contains colored alcohol or spirit with a visible air bubble
Types: Horizontal, vertical, and multi-angle levels
Sizes: Small (pocket-size) to large (for construction and lab setups)
Accuracy: ±0.5 mm/m or better depending on quality
Used in physics labs to level instruments like optical benches, spectrometers, and balances
Essential for engineering setups, DIY projects, and construction work
Helps ensure precise alignment during experiments and instrument calibration
Common in CBSE/ICSE lab kits and educational science tools
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