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A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 4.0 mW. How many photons are emitted per second by this laser?

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B. Haranadh Kumar
B. Haranadh KumarLv10
19 Dec 2020
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Fusion is the process by which the sun produces energy. One experimental technique for creating controlled fusion utilizes a solid-state laser that emits a wavelength of 1060 nm and can produce a power of 1.0 x 10^14 W for a pulse duration of 1.1 x 10^(-11) s. In contrast, the helium/neon laser used at the checkout counter in a bar-code scanner emits a wavelength of 633 nm and produces a power of about 1.0 x 10^(-3) W. How long (in days) would the helium/neon laser have to operate to produce the same number of photons that the solid-state laser produces in 1.1 x 10^(-11) s?

The wavelength of red helium-neon laser light in air is 632.8 nm.

(a) What is its frequency?
(b) What is its wavelength in glass that has an index of refraction of 1.48?
(c) What is its speed in the glass?

The wavelength of red helium-neon laser light in air is 632.8 nm. (a) What is its frequency? (b) What is its wavelength in glass that has an index of refraction of 1.50? (c) What is its speed in the glass?

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