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
A
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Iron absorption lines that occur in the solar spectrum indicate that iron exists in the solar
A) atmosphere. B) surface. C) interior. D) none of the above
Which of the following is usually burned up in Earth's atmosphere?
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