Electromagnetic Radiation with a Wavelength of 640 Nm Appears as Orange

Multiple Choice

Electromagnetic radiation with a wavelength of 640 nm appears as orange light to the human eye. The energy of one photon of this light is J.

A) 1.272 × 10^{- 22}
B) 3.220 × 10¹⁸
C) 1.272 × 10^{- 31}
D) 3.106 × 10^{- 19}
E) 3.106 × 10^{- 28}