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(a) How many photons are emitted per second by a He-Nelaser that emits 2.2 $\mathrm{mW}$ of power at a wavelength $\lambda=632.8 \mathrm{nm}$ ?(b) What is the frequency of the electromagnetic waves emittedby a He-Ne laser?

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Physics 103

Chapter 30

Quantum Physics

Rutgers, The State University of New Jersey

University of Sheffield

McMaster University

Lectures

02:51

In physics, wave optics is…

10:02

Interference is a phenomen…

02:03

How many photons per secon…

01:58

01:00

A helium-neon laser emits …

01:38

01:28

The power of a red laser $…

02:46

How much energy is contain…

03:49

A laser produces a short p…

03:32

A 1.0 mW helium neon laser…

01:25

Red Lasers The power of a …

05:36

A $200-$ W infrared laser …

power emitted by helium. Neon laser equals 2.2 million votes, so power equals 2.2 million watts. To point to Millie walks, 2.2 million watts equals two point toe multiply by Ah Dante Power minus tree Jewell were second rental put own lender equals 6 32.8 nanometers, 6 32 point it mana meters 6 32.8 nanometers equal. Ah, 6 32.8 Multiply by 10 to the power minus my leaders, and we have energy. Your foot on e equals X times see Divided by Lambda H blanks, constant is equal to 6.63 Multiply by 10 to the power minus 34 multiplied by see speed off light. Three. Multiply by 10 to the power it divided by Linda is 6 32 point and multiply by 10 to the power minus line and solving this will be had equals 3.1 3.1, multiplied by 10 to the power minus 19. Jules Dan, Teri Bauer minus 19 Jules. Number of photons emitted per second by William Me on leather. Um, so a number or for tones? Four dawns. Emitted per second imitated per second for a second equals 2.2. Multiply by 10 to the power minus three, divided by 3.1. Multiply by 10 to the power minus 19. Dividing the numbers we get 7.1 7.1, multiplied by 10 30 Power 15 4 Don't stand to the power 15 four tones So number of photons emitted per second is 7.1, multiplied by 10 to the power 15 for tones. No, let's do part B this WAAS uh, part, eh? No Lex to part B. We know that Sequels F Lando F Lambda therefore f pickles tree multiply by 10 to the power eight Divided by lender is are 632.86 chri I do point it multiply by 10 to the power minus nine Dividing the numbers f equals 4.7 4.7 multiplied by 10 to the power 14 hearts

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