A totally eclipsed moon glows coppery! red because breaches:

Options

A. the moon's surface is made of it ore which is red in colour
B. red light is cooler than blue light
C. during a lunar eclipse the sun cooler than normal and its light more red
D. only red light is able to pass completely through Earth atmosphere and reach the moon.

Explanation

### Step-by-Step Solution:

1. **Understanding the Lunar Eclipse**: A lunar eclipse occurs when the Earth is positioned directly between the Sun and the Moon, causing the Earth's shadow to fall on the Moon.

2. **Light and Color**: The light from the Sun is made up of various colors, which can be seen in a rainbow. Each color has a different wavelength, with red light having a longer wavelength compared to blue light.

3. **Earth's Atmosphere**: As sunlight passes through the Earth's atmosphere, it scatters. Shorter wavelengths of light (like blue) scatter more than longer wavelengths (like red). This scattering is why the sky appears blue during the day.

4. **Red Light Reaches the Moon**: During a total lunar eclipse, the Earth's atmosphere filters out most of the blue and green light, allowing primarily red light to pass through. This red light then travels through the atmosphere and reaches the Moon.

5. **Appearance of the Moon**: As a result of this filtering process, the Moon appears coppery red during a total lunar eclipse. This phenomenon is often referred to as a "Blood Moon."

6. **Conclusion**: The coppery red glow of the eclipsed Moon is due to the scattering of light in the Earth's atmosphere, which allows only red light to reach the Moon.