In a barometer the height of the mercury column suddenly changes from 76 cm to 60 cm at a particular place. What does it indicate?

Explanation

To solve the question about the change in the height of the mercury column in a barometer from 76 cm to 60 cm, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Function of a Barometer**:
A barometer is an instrument used to measure atmospheric pressure. The height of the mercury column in the barometer is directly related to the atmospheric pressure exerted on it.

2. **Identify Normal Atmospheric Pressure**:
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