What is the frequency of electromagnetic radiation having a wavelength of 2.59 ✕ 10^-8 m?

thats how its supposed to be

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.