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saul85 [17]
3 years ago
13

1. In addition to being necessary for respiration, _______ also provides UV radiation protection.

Chemistry
1 answer:
Harlamova29_29 [7]3 years ago
7 0
Oxygen - is the answer
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What is the energy of a photon of infrared radiation with a frequency of 2. 53 × 1012 Hz? Planck’s constant is 6. 63 × 10–34 J •
Ipatiy [6.2K]

The energy of the IR photon is \rm 1.68\;\times\;10^{-21} J. Thus, option C is correct.

The energy of the radiations propagating in the air with the velocity of \rm 3\;\times\;10^8 m/s is given by:

E=h\nu

Where, <em>h </em>is Planck's constant, and \nu is the frequency.

<h3>Computation for the energy of IR photon</h3>

The value of Planck's constant is given as, \rm 6.63\;\times\;10^{-34}\;J.s^-^1

The frequency of the IR radiation is \rm 2.53\;\times\;10^1^2\;Hz

Substitute the values for the energy of the photon

\rm E=6.63\;\times\;10^{-34}\;J.s^{-1}\;\times\;2.53\;\times\;10^{12}\;Hz\\ E=16.8\;\times\;10^{-22}\;J\\E=1.68\;\times\;10^{-21}\;J

The energy of the IR photon is \rm 1.68\;\times\;10^{-21} J. Thus, option C is correct.

Learn more about the energy of photons, here:
brainly.com/question/15870724

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