The Wavelength of Light Visible to the Human Eye Is

Multiple Choice

The wavelength of light visible to the human eye is on the order of 5 × 10−⁷ m. If the speed of light in air is 3 × 10⁸ m/s, find the frequency of the lightwave.

A) 3 × 10⁷ Hz
B) 4 × 10⁹ Hz
C) 5 × 10¹¹ Hz
D) 6 × 10¹⁴ Hz
E) 4 × 10¹⁵ Hz