Electromagnetic radiation with a wavelength of 745 nm appears as red light to the human eye.The energy of one photon of this light is ________ J. A) 1.48 × 10^-31 B) 2.67 × 10^-²⁸ C) 2.67 × 10^-¹⁹ D) 1.48 × 10^-22 E) 3.75 × 10¹⁸

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 (745 nm = 745 × 10^-9 m). Substituting these values gives E ≈ 2.67 × 10^-19 J.

Electromagnetic Radiation with a Wavelength of 745 Nm Appears as Red