Electromagnetic Radiation with a Wavelength of 575 Nm Appears as Yellow

Multiple Choice

Electromagnetic radiation with a wavelength of 575 nm appears as yellow light to the human eye.The energy of one photon of this light is 3.46 × 10^-19 J.Thus,a laser that emits 1.3 × 10^-2 J of energy in a pulse of light at this wavelength produces ________ photons in each pulse.

A) 2.7 × 10^-17
B) 7.8 × 10^-24
C) 2.2 × 10¹⁹
D) 3.8 × 10¹⁶
E) 6.5 × 10¹³