Which of the following statement is incorrect regarding the polar satellite ?

Options

A. 1. A polar satellite goes around the earth's pole in north-south direction.
B. 2. Polar satellite are used to study topography of Moon, Venus and Mars.
C. 3. A polar satellite is a high altitude satellite.
D. 4. The time period of polar satellite is about 100 minutes.

Explanation

To determine which statement is incorrect regarding polar satellites, let's analyze each option step by step.

### Step 1: Understand the definition of a polar satellite
A polar satellite is one that orbits the Earth in a north-south direction, passing over the poles. This allows it to cover the entire surface of the Earth over time.

### Step 2: Analyze the first statement
**Statement 1:** "A polar satellite goes around the Earth pole in north-south direction."
- This statement is **correct**. Polar satellites indeed travel in a north-south orbit.

### Step 3: Analyze the second statement
**Statement 2:** "Polar satellites are used to study the topography of Moon, Venus, and Mars."
- This statement is also **correct**. Polar satellites can be used for remote sensing and studying the topography of other celestial bodies.

### Step 4: Analyze the third statement
**Statement 3:** "Polar satellite is a high-altitude satellite."
- This statement is **incorrect**. Polar satellites are typically low-altitude satellites, which allows them to capture detailed images and data of the Earth's surface.

### Step 5: Analyze the fourth statement
**Statement 4:** "The time period of a polar satellite is about 100 minutes."
- This statement is **correct**. The orbital period of polar satellites is generally around 90 to 100 minutes.

### Conclusion
After analyzing all the statements, the incorrect statement regarding polar satellites is:
**"Polar satellite is a high-altitude satellite."**