You Need 14 W of Infrared Laser Light Power with Wavelength

question 52

Multiple Choice

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

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