A spirit level is an instrument designed to check whether a surface is horizontal or not. Which of the following creates the bubble inside a spirit level?
روح کی سطح ایک ایسا آلہ ہے جو یہ چیک کرنے کے لئے ڈیزائن کیا گیا ہے کہ آیا سطح افقی ہے یا نہیں۔ مندرجہ ذیل میں سے کون روح کی سطح کے اندر بلبلا تخلیق کرتا ہے؟
Answer: A gap left in the liquid
Explanation
The bubble in a spirit level is formed by leaving an air gap inside a sealed liquid vial.
This air gap naturally moves to the highest point, helping indicate level alignment.
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