Question

the thickness of dna is about 3×10⁻⁹ meter. the thickness of the smallest thing visible to the naked eye is 1×10⁻⁴ meter. can dna be viewed by the naked eye?

Explanation:

Step1: Compare the thicknesses

We compare the thickness of DNA ($3\times 10^{-9}$ m) and the smallest - visible - to - naked - eye thickness ($1\times 10^{-4}$ m).
Since $3\times 10^{-9}<1\times 10^{-4}$.

Answer:

NO