Displacement of sun with respect to earth is?
Correct answer: D. r
- A. r^2d
- B. 2πr
- C. 2r
- D. r
Explanation
The displacement of the Sun with respect to Earth can be described in two different ways: 1. Daily Apparent Motion: The Sun appears to move across the sky during the day due to Earth's rotation on its axis. This apparent motion is from east to west, and it takes approximately 24 hours for the Sun to complete one full circuit around the sky. This displacement of the Sun is a result of Earth's rotation and is responsible for the day-night cycle. 2. Annual Apparent Motion: Over the course of a year, the Sun's position in the sky changes due to Earth's orbital motion around the Sun. The Earth's orbit around the Sun is not a perfect circle but an ellipse. Therefore, the distance between Earth and the Sun changes slightly throughout the year. This causes the Sun's apparent position against the background stars to shift gradually, resulting in the changing seasons. During the year, Earth's axial tilt also plays a crucial role. As the Earth orbits the Sun, the tilt of its axis causes the Sun's rays to strike different latitudes at varying angles, leading to the changing seasons. For example, when the Northern Hemisphere is tilted towards the Sun, it experiences summer, while the Southern Hemisphere experiences winter. Six months later, the situation is reversed. It's important to note that while we perceive the Sun's motion as displacement from the Earth's perspective, in reality, the Sun is stationary in its position, and the apparent motion is a result of Earth's rotation and orbital motion.
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