The Wavelength of an Electromagnetic Wave Is $600 \mathrm {~nm}$ What Is Its Frequency

Multiple Choice

The wavelength of an electromagnetic wave is $600 \mathrm {~nm}$ . What is its frequency? $\left( c = 3.0 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } \right)$

A) $300 \times 10 ^ { 12 } \mathrm {~Hz}$
B) $600 \times 10 ^ { 12 } \mathrm {~Hz}$
C) $500 \times 10 ^ { 12 } \mathrm {~Hz}$
D) $200 \times 10^{12} \mathrm {~Hz}$
E) $400 \times 10 ^ { 12 } \mathrm {~Hz}$