Lasers: You Need 14 W of Infrared Laser Light Power

question 18

Multiple Choice

Lasers: You need 14 W of infrared laser light power with wavelength 1270 nm to bore a hole in a diamond. How many downward atomic transitions per second must occur in the laser if all of them result in light directed onto the diamond? (c = 3.00 × 10⁸ m/s, h = 6.626 × 10^-34 J ∙ s)

• A) 8.9 × 10¹⁹
• B) 8.9 × 10¹⁸
• C) 5.9 × 10¹⁹
• D) 2.7 × 10¹⁸