If a 755 Nm Photon Travels in Vacuum, What Is

If a 755 nm photon travels in vacuum, what is the frequency of this photon? Recall that the speed of light in vacuum is 2.998 × 10 ⁸ m\ s .

A) 3.97 × 10 ¹⁴ s ^{− 1}
B) 9.17 × 10 ¹³ s ^{− 1}
C) 3.97 × 10 ¹⁶ s ^{− 1}
D) 2.52 × 10 ¹⁵ s ^{− 1}