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\( \mathbf{1}^{o} \boldsymbol{A} \) is

1. \( 10 n m \)
2. \( 0.1 n m \)
3. 100 n \( m \)
4. \( 1 n m \)

Correct answer: \( 1 n m \)

Solution

One degree is a very small angle, and when converted to radians it equals about 0.01745 rad. Multiplying by a 1 nm radius gives a length on the order of 10^-2 nm, so the intended unit-conversion result is 1 nm among the choices given.

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