The role of lasers in reading a compact disc has to be explained. Concept introduction: When light of certain wavelength falls on ruby crystal (aluminum oxide contains small amount of chromium(III) ions), the chromium ions undergo transition from level one to level three . Most of Cr 3+ ions in level three undergo radiation less transition to level two by losing energy in form of heat than emitting photons. Level two has much greater lifetime which leads to accumulation of Cr 3+ ions in level three. When these accumulated ions emit all at same time an intense emission will occur. The wavelength of photon from emitted ion and original photon are same. Now there are two photons one original photon and another by stimulated emission. Finally there is increase in intensity of light at this wavelength.

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Answer 1

Question

Chapter 7, Problem 7.92QP

Interpretation Introduction

Interpretation:

The role of lasers in reading a compact disc has to be explained.

Concept introduction:

When light of certain wavelength falls on ruby crystal (aluminum oxide contains small amount of chromium(III) ions), the chromium ions undergo transition from level one to level three . Most of Cr3+ ions in level three undergo radiation less transition to level two by losing energy in form of heat than emitting photons. Level two has much greater lifetime which leads to accumulation of Cr3+ ions in level three. When these accumulated ions emit all at same time an intense emission will occur. The wavelength of photon from emitted ion and original photon are same. Now there are two photons one original photon and another by stimulated emission. Finally there is increase in intensity of light at this wavelength.

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Answer 2

Question

Chapter 7, Problem 7.92QP

Interpretation Introduction

Interpretation:

The role of lasers in reading a compact disc has to be explained.

Concept introduction:

When light of certain wavelength falls on ruby crystal (aluminum oxide contains small amount of chromium(III) ions), the chromium ions undergo transition from level one to level three . Most of Cr3+ ions in level three undergo radiation less transition to level two by losing energy in form of heat than emitting photons. Level two has much greater lifetime which leads to accumulation of Cr3+ ions in level three. When these accumulated ions emit all at same time an intense emission will occur. The wavelength of photon from emitted ion and original photon are same. Now there are two photons one original photon and another by stimulated emission. Finally there is increase in intensity of light at this wavelength.

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Answer 3

Question

Chapter 7, Problem 7.92QP

Interpretation Introduction

Interpretation:

The role of lasers in reading a compact disc has to be explained.

Concept introduction:

When light of certain wavelength falls on ruby crystal (aluminum oxide contains small amount of chromium(III) ions), the chromium ions undergo transition from level one to level three . Most of Cr3+ ions in level three undergo radiation less transition to level two by losing energy in form of heat than emitting photons. Level two has much greater lifetime which leads to accumulation of Cr3+ ions in level three. When these accumulated ions emit all at same time an intense emission will occur. The wavelength of photon from emitted ion and original photon are same. Now there are two photons one original photon and another by stimulated emission. Finally there is increase in intensity of light at this wavelength.

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Answer 4

Question

Chapter 7, Problem 7.92QP

Interpretation Introduction

Interpretation:

The role of lasers in reading a compact disc has to be explained.

Concept introduction:

When light of certain wavelength falls on ruby crystal (aluminum oxide contains small amount of chromium(III) ions), the chromium ions undergo transition from level one to level three . Most of Cr3+ ions in level three undergo radiation less transition to level two by losing energy in form of heat than emitting photons. Level two has much greater lifetime which leads to accumulation of Cr3+ ions in level three. When these accumulated ions emit all at same time an intense emission will occur. The wavelength of photon from emitted ion and original photon are same. Now there are two photons one original photon and another by stimulated emission. Finally there is increase in intensity of light at this wavelength.

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Answer 5

Chapter 7, Problem 7.92QP

Interpretation Introduction

Interpretation:

The role of lasers in reading a compact disc has to be explained.

Concept introduction:

When light of certain wavelength falls on ruby crystal (aluminum oxide contains small amount of chromium(III) ions), the chromium ions undergo transition from level one to level three . Most of Cr3+ ions in level three undergo radiation less transition to level two by losing energy in form of heat than emitting photons. Level two has much greater lifetime which leads to accumulation of Cr3+ ions in level three. When these accumulated ions emit all at same time an intense emission will occur. The wavelength of photon from emitted ion and original photon are same. Now there are two photons one original photon and another by stimulated emission. Finally there is increase in intensity of light at this wavelength.

Answer 6

Chapter 7, Problem 7.92QP

Interpretation Introduction

Interpretation:

The role of lasers in reading a compact disc has to be explained.

Concept introduction:

When light of certain wavelength falls on ruby crystal (aluminum oxide contains small amount of chromium(III) ions), the chromium ions undergo transition from level one to level three . Most of Cr3+ ions in level three undergo radiation less transition to level two by losing energy in form of heat than emitting photons. Level two has much greater lifetime which leads to accumulation of Cr3+ ions in level three. When these accumulated ions emit all at same time an intense emission will occur. The wavelength of photon from emitted ion and original photon are same. Now there are two photons one original photon and another by stimulated emission. Finally there is increase in intensity of light at this wavelength.

Answer 7

Chapter 7, Problem 7.92QP

Interpretation Introduction

Interpretation:

The role of lasers in reading a compact disc has to be explained.

Concept introduction:

When light of certain wavelength falls on ruby crystal (aluminum oxide contains small amount of chromium(III) ions), the chromium ions undergo transition from level one to level three . Most of Cr3+ ions in level three undergo radiation less transition to level two by losing energy in form of heat than emitting photons. Level two has much greater lifetime which leads to accumulation of Cr3+ ions in level three. When these accumulated ions emit all at same time an intense emission will occur. The wavelength of photon from emitted ion and original photon are same. Now there are two photons one original photon and another by stimulated emission. Finally there is increase in intensity of light at this wavelength.

Answer 8

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Answer 10

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Answer 11

Ch. 7.1 - The frequency of the strong red line in the...Ch. 7.1 - The element cesium was discovered in 1860 by...Ch. 7.1 - Laser light of a specific frequency falls on a...Ch. 7.2 - The following are representative wavelengths in...Ch. 7.3 - Calculate the wavelength of light emitted from the...Ch. 7.3 - What is the difference in energy levels of the...Ch. 7.3 - An atom has a line spectrum consisting of a red...Ch. 7.4 - Calculate the wavelength (in picometers)...Ch. 7.4 - A proton is approximately 2000 times heavier than...Ch. 7.5 - Explain why each of the following sets of quantum...

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