Physic homework

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Nyvar9909

Science

Robert Morris University

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I'm working on a physics question and need guidance to help me learn.

 

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1. Calculate the frequency of a photon whose wavelength is (a) 6200 angstrom units, (b) 1300 angstrom units, (c) 120 angstrom units, and (d) 0.15 angstrom units. 2. Calculate the wavelength of a photon whose frequency is (a) 3.35 x 1014 hertz, (b) 1.51 x 1015 hertz, (c) 1.13 x 1016 hertz, and (d) 6.43 x 1016 hertz. Express your answers in meters and angstrom units. 3. Barium-137m emits 0.6616 MeV -rays. (a) What is the wavelength of these gamma rays in Angstrom units? (b) What is the frequency? 4. An atom absorbs a 3750 angstrom unit photon. How much energy (in eV) is absorbed? 5. A 140 keV photon is absorbed by an electron in a certain isotope, causing the electron to become unbound to the atom. (a) What is the wavelength of the photon in angstrom units? (b) What is the frequency of the photon?
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Explanation & Answer:
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1. Calculate the frequency of a photon whose wavelength is
(a) 6200 angstrom units,
c = λ𝑣
c
2.998 × 108 m/s
𝑣= =
= 4.8 × 1014 Hz
−10
10
m
λ
6200 Å (
)

(b) 1300 angstrom units,
c
2.998 × 108 m/s
𝑣= =
= 2.3 × 1015 Hz
−10
10
m
λ
1300 Å (
)

(c) 120 angstrom units, and
c 2.998 × 108 m/s
𝑣= =
= 2.5 × 10...

puevfbyvinerf (896)
Cornell University

Anonymous
I was struggling with this subject, and this helped me a ton!

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