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

Question

Quizplus · Accepted Answer

The energy of a photon is calculated using the formula E = hc/λ, where h is Planck's constant (6.626 × 10^-34 J·s), c is the speed of light (3.00 × 10^8 m/s), and λ is the wavelength in meters (640 nm = 640 × 10^-9 m). Substituting these values gives E ≈ 3.106 × 10^-19 J.

Electromagnetic Radiation with a Wavelength of 640 Nm Appears as Orange