Wavelength of black color - Physics Stack Exchange
WEBMar 14, 2019 · Wavelength happens in the physical world. Color happens in your brain. "Black" is our name for how we perceive something that emits/reflects substantially less light than other things in our field of view. Any wavelength can look black if you put it next to something that is brighter by a few orders of magnitude. – Solomon Slow.
Black Bodies and appearing black - Physics Stack Exchange
WEBJun 18, 2017 · When the max intense wavelength is far far away from the visible region then the visible wavelengths will have very low intensities and hence no color is visible and black-body looks black. For a black-body to look white, it will have to emit wavelengths corresponding to the visible region with nearly equal intensities because white light is ...
What is the frequency of the color black? - Physics Stack Exchange
WEBJul 31, 2015 · Black is not a color, it is a shade. In physics, we call something "black" when it does not reflect any of the incident light. However, all black bodies radiate. The frequency of that radiation, the black body spectrum, is a function of the temperature of the object and follows Planck's Law:
thermodynamics - How to understand Black-Body Curves and get …
WEBSep 11, 2021 · I'm sorry, but you interpret these graphs like any other graphs: first make sure you know what 'spectral radiance' and 'wavelength' mean, and what these terms are being applied to: I'd recommend that you take a black body to be a small hole in the wall of a cavity with walls at uniform temperature. So the radiation emerging from the hole is a ...
Why aren't the graphs for black body radiation straight lines?
WEBThe graph depicts intensity, that goes with the (square of the) amplitude. Additionally, a blackbody happen to have that dependency of intensity with wavelength, but that is another history. There are another different shapes, like that of synchrotron radiation or when there are emission lines. – Eduardo Guerras Valera.
Planck's Law in terms of wavelength - Physics Stack Exchange
WEBI am drawing a blank when it comes to equation transformation. Wikipedia gives two equations for the spectral radiance of black body: First as a function of frequency ν ν: I(ν, T) = 2hν3 c2 ⋅ 1 ehν kT − 1 I (ν, T) = 2 h ν 3 c 2 ⋅ 1 e h ν k T − 1. Then as a function of wavelength λ λ : I′(λ, T) = 2hc2 λ5 ⋅ 1 e hc λkT − ...
visible light - Explanation about black color, and hence color ...
WEBJul 26, 2012 · Light is photons, electromagnetic radiation, that is picked up by the rods and cones in the human eye. Photons oscillate as they travel through space. The difference in the wavelength as they travel gives the very difference in colour. The spectrum of visible light is from violet at about 380nm to red at about 720nm. The rest is invisible light.
Why do dark colors absorb light more than light colors?
WEBDec 7, 2019 · So as far as dark blue versus light blue, there are many things that can be happening. 1) at the atomic level there are more interactions absorbing photons for dark blue than light blue. 2) at the atomic level the freeqeuencies reflected by the material give the dark versus light contrast. 3) the color perception of the eyes may give this ...
I don't understand black body radiation graphs
WEBJun 20, 2015 · A black body of ANY temperature will emit all types of radiations (eg UV, X-rays, visible light etc). BUT, at higher temperatures eg 60000K, certain transitions in quantum states are favoured more, thus we would expect more intense radiation to prevail eg gamma. The dependence of spectra radiance (y-axis) on wavelength (x …
black holes - What happens when the DeBroglie wavelength …
WEBJan 13, 2019 · The DeBroglie wavelength $\lambda$ depends on the speed of the particle: $\lambda = \dfrac{h}{mv}$ So a particle that has a mass like a grain of salt can have an arbitrarily large DeBroglie wavelength if it moves slowly enough. And likewise, a tiny particle like an electron can have an arbitrarily small wavelength if it moves fast enough.