Chapter 38: Q 8 (page 1114)

a. Determine the energy, in eV, of a photon with a 550 nm wavelength.
b. Determine the wavelength of a 7.5 keV x-ray photon.

Short Answer

Expert verified

a) Energy of the photon is 2.26 eV.

b) Wavelength of the x-ray photon is 0.165 nm.

Step by step solution

Step 1. Given information is :a) A photon with 550 nm wavelength.b) A 7.5 keV x-ray photon.

We need to find out :

a) Energy of the photon

b) Wavelength of the x-ray photon

Step 2. Part a) Using expression for energy of photon

$E = h f f = \frac{c}{λ} E = h \frac{c}{λ} E = \frac{(6.63 \times 10^{- 34}) (3 \times 10^{8} m / s)}{550 \times 10^{- 9} m} E = 2.26 e V$

Step 3. Part b) Using expression of Energy of the photon to find out the wavelength.

$E = \frac{h c}{λ} λ = \frac{h c}{E} λ = \frac{(6.63 \times 10^{- 34}) (3 \times 10^{8} m / s)}{7.5 \times 10^{3} \times 1.6 \times 10^{- 19} V} λ = 0.165 n m$

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a. Determine the energy, in eV, of a photon with a 550 nm wavelength.
b. Determine the wavelength of a 7.5 keV x-ray photon.

Short Answer

Step by step solution

Step 1. Given information is :a) A photon with 550 nm wavelength.b) A 7.5 keV x-ray photon.

Step 2. Part a) Using expression for energy of photon

Step 3. Part b) Using expression of Energy of the photon to find out the wavelength.

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a. Determine the energy, in eV, of a photon with a 550 nm wavelength.b. Determine the wavelength of a 7.5 keV x-ray photon.

Short Answer

Step by step solution

Step 1. Given information is :a) A photon with 550 nm wavelength.b) A 7.5 keV x-ray photon.

Step 2. Part a) Using expression for energy of photon

Step 3. Part b) Using expression of Energy of the photon to find out the wavelength.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Physics Textbooks

Wave Optics

Fields in Physics

Electricity

Further Mechanics and Thermal Physics

Electromagnetism

Measurements

Study anywhere. Anytime. Across all devices.

a. Determine the energy, in eV, of a photon with a 550 nm wavelength.
b. Determine the wavelength of a 7.5 keV x-ray photon.