Radiation with a frequency of 3.9*10¹⁴/sec has what wavelength? A) 1.3*10⁶ m B) 7.7*10^-7 cm C) 7.7*10^-7 m D) 3.1*10⁶ m E) 1.3*10⁶ cm

Question

Quizplus · Accepted Answer

We can use the equation c = λν to solve for the wavelength (λ), where c is the speed of light (3.00 x 10^8 m/s) and ν is the frequency given in the problem. 
λ = c/ν = (3.00 x 10^8 m/s) / (3.9 x 10^14 /sec) = 7.7 x 10^-7 m = 7.7 x 10^-5 cm. 
The answer is closest to choice C, which is 7.7 x 10^-7 m.

Radiation with a Frequency of 3