Physics
Mention two demerits of a simple barometer and state how they are removed in a Fortin barometer.
Answer
The demerits of a simple barometer are —
- There is no protection for the glass tube.
- A scale cannot be fixed with the tube to measure the atmospheric pressure.
Fortin barometer removes these demerits in the following ways:
- The glass tube is protected by enclosing it in a brass case.
- For accurate measurement, a main scale alongwith a vernier scale are provided.
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