All Questions
Tagged with conventions wavelength
10
questions
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What is the wavelength range of X-rays?
I was reading and came across the following paragraph
The X-rays thus produced by many electrons make up the continuous spectrum of Figure 2-10 and are very many discrete photons whose wavelengths ...
- 959
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3
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Wavenumber definition in theoretical physics
I am trying to understand the physical meaning of the wavenumber, which as explained in wikipedia, is the magnitude of the wave vector, which, if I am not mistaken, the wave vector gives information ...
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Is there a name for this type of wavevector?
When we say wavevector we often mean a vector $\mathbf k$ that is related to the direction and wavelength of a plane wave, given by $e^{i\,\mathbf k\cdot\mathbf x}$. I have to write something about ...
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Why refer to Near Infrared Reflectance Spectroscopy (NIRS) while using a much wider spectrum (350-2500 nm)?
I am puzzled about the way a method names vs. specificity of the method differ in the literature around spectroscopy applications.
A very widely used field spectroradiometer, recording reflectance ...
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Is there a $\pi$ in Planck's Radiation Law?
In Sear and Zemansky's University Physics with Modern Physics 13th edition and other sources like this post, it says the formula for Planck's radiation is given by:
$$I(\lambda)=\frac{2\pi hc^{2}}{\...
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What is the physical interpretation of dividing $2\pi$ by a variable?
Looking at the angular wavenumber eqn:
$$k = \frac{2\pi}{\lambda} = \frac{2\pi\nu}{v_p} = \frac{\omega}{v_p}$$
I'm curious what it means to divide $2\pi$ by the wavelength and why $2\pi$ was chosen....
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Blackbody Radiation -- Minus Sign Popping Up When Deriving Rayleigh-Jeans Formula
I saw this question: Trouble in deriving the Rayleigh-Jeans formula from the steps shown on HyperPhysics site, but I don't consider it answered, so I'd like to dwell a little more into it.
After ...
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Is optical path length (OPL) usually in units of length, or wavelength?
When I do calculations, I usually define optical path length (OPL) of a path as the integral of index $n$ along a path divided by the vacuum wavelength, so that I can get the phase easily. So for a ...
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Trouble in deriving the Rayleigh-Jeans formula from the steps shown on HyperPhysics site
Hi I am very new to this aspect of physics and I am having trouble with the derivation of the Rayleigh-Jeans from the steps shown at the hyperphysics web site. I have emailed Dr. Rod Nave who is ...
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Why "colours" of light are given in wavelength not frequency?
If I understand correctly, when a beam of (monochromatic) light passes through media of different refractive indices, its wavelength changes but frequency remains constant.
Why, then, are colours of ...
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