If there were no atmosphere, what would be the colour of the Earth?

Options

A. red
B. blue
C. black
D. white

Answer

**Step-by-Step Solution:**

1. **Understanding the Earth's Atmosphere**: The Earth is surrounded by a thin layer of atmosphere, which consists of various gases and air molecules. This atmosphere plays a crucial role in how we perceive colors in our environment.

2. **Effect of Atmosphere on Light**: When sunlight (which is white light) passes through the atmosphere, it interacts with the air molecules. This interaction causes the light to scatter. The blue light scatters more than other colors because it travels in shorter, smaller waves.

3. **Color of the Sky**: Due to this scattering of blue light, we see the sky as blue during the day. The presence of the atmosphere is what causes this effect.

4. **What Happens Without an Atmosphere**: If there were no atmosphere, there would be no air molecules to scatter the sunlight. As a result, the light would not split into different colors.

5. **Conclusion on the Color of Earth**: In the absence of an atmosphere, the sky would appear black, as there would be no scattering of light. The Earth itself would still reflect sunlight, but the sky would not be blue; it would be black, revealing the darkness of space.

6. **Final Answer**: Therefore, if there were no atmosphere, the color of the Earth would be perceived against a black sky.

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