One picometre is equal to _____.

Options

A. `10^(12) m`
B. `10^(11)m`
C. `10^(-11)m`
D. `10^(-12)m`

Answer

To solve the question "One picometre is equal to _____," we need to understand the relationship between picometres and metres.

### Step-by-Step Solution:

1. **Understand the Basic SI Unit**:
- The basic SI unit for measuring distance is the meter (m).

2. **Define Picometre**:
- A picometre (pm) is a subunit of meter.

3. **Conversion Factor**:
- It is known that 1 picometre is equal to \(10^{-12}\) meters. This means that a picometre is one trillionth of a meter.

4. **Write the Relation**:
- Therefore, we can express this relationship as:
\[ 1 \text{ pm} = 10^{-12} \text{ m} \]

5. **Identify the Correct Option**:
- From the options provided, we need to find the one that matches \(10^{-12}\) meters.
- The correct option is \(10^{-12}\).

### Final Answer:
One picometre is equal to \(10^{-12}\) meters.

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