Question

How long in meters is 670 nanometers?

Answer 1

Answer:
670 nanometers is $670\times {10}^{-9}$ meters or $6.7\times {10}^{-7}$ metres in scientific notation or $0.00000067$ meters in standard form.
Explanation:
In metric system everything is standardized. In metric system as nano is one-billionth or ${10}^{-9}$
One nanometer is ${10}^{-9}$ meter, hence
670 nanometers is $670\times {10}^{-9}$ meters or $6.7\times {10}^{-7}$ metres in scientific notation or $0.00000067$ meters