A bomb explodes on moon. How long does the sound take to reach the earth (average distance between the earth and moon `3.8xx10^(8)m)`

Options

A. A) `1.16xx10^(6)s`
B. B) `1.16xx10^(6)hr`
C. C) `10s`
D. D) Sound is not transmitted to earth

Answer

To solve the question "A bomb explodes on the moon. How long does the sound take to reach the Earth?" we need to consider the properties of sound and the conditions on the moon.

### Step-by-Step Solution:

1. **Understand the Nature of Sound**:
- Sound is a mechanical wave that requires a medium (like air, water, or solid materials) to travel through. It cannot propagate in a vacuum.

2. **Consider the Environment on the Moon**:
- The moon has no atmosphere; it is essentially a vacuum. This means there are no air molecules or any other medium present to carry sound waves.

3. **Conclusion on Sound Propagation**:
- Since sound requires a medium to travel and there is no medium on the moon, the sound produced by the explosion of the bomb cannot travel through space to reach Earth.

4. **Final Answer**:
- Therefore, the answer to the question is that sound will not reach Earth from the moon. The correct option is D: "Sound is not transmitted through Earth."