Question

Most helium-neon lasers emit visible light with a wavelength of $633 \mathrm{nm}$. These lasers can also emit photons in the infrared with a wavelength of $1.15 \mu \mathrm{m}$. What is the frequency of these photons?

Name: Problem 34, Chapter 29: College Physics: Reasoning and Relationships
Uploaded: 2022-02-11T19:05:37-08:00
Duration: 1 min 1 s
Channel: Raj Bala
Description: Most helium-neon lasers emit visible light with a wavelength of 633 nm. These lasers can also emit photons in the infrared with a wavelength of 1.15 μm. What is the frequency of these photons?

   Most helium-neon lasers emit visible light with a wavelength of $633 \mathrm{nm}$. These lasers can also emit photons in the infrared with a wavelength of $1.15 \mu \mathrm{m}$. What is the frequency of these photons?

College Physics: Reasoning and Relationships

Nicholas J.… 2nd Edition

Chapter 29, Problem 34

Instant Answer

Solved by Expert Raj Bala

02/11/2022

Step 1

This relationship is given by the equation F = c/λ, where c is the speed of light, which is approximately $3 \times 10^8$ m/s. Show more…

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Most helium-neon lasers emit visible light with a wavelength of $633 \mathrm{nm}$. These lasers can also emit photons in the infrared with a wavelength of $1.15 \mu \mathrm{m}$. What is the frequency of these photons?

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Key Concepts

SI Unit Conversions

In physics, it is important to convert all measurements to the International System of Units (SI) for consistency and accuracy in calculations. This often involves converting subunits, such as micrometers to meters, to properly apply formulas like c = ?f.

Wavelength-Frequency Relationship

Electromagnetic waves follow the relationship c = ?f, where c is the speed of light, ? is the wavelength, and f is the frequency. This equation shows that the frequency of an electromagnetic wave is inversely proportional to its wavelength, meaning that as the wavelength increases, the frequency decreases.

Speed of Light

The speed of light is a fundamental constant in physics that represents the rate at which light and all electromagnetic radiation travel in a vacuum. Its value is approximately 3.00 × 10^8 meters per second and it plays a central role in many physical equations, including those that relate frequency and wavelength.

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