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When a em wave is incident on a perfect conductor then what happens to the reflection coefficient?
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How do you compare reflection refraction and dispersion?
You can compare it by saying that each of them occur when a light transfers through one meduim to another. That's one way of explaining it.That is incorrect :( It happens when light is shone onto or through a different medium. Reflection happens when light is shone ONTO a mirror, you cant shine light THROUGH a mirror.
What happens to the colors that are not transmitted through transparent or translucent objects?
reflection
What happens when parallel rays of light hit a smooth surface?
Regular reflection happens.
What happens in absorption transmission and scattering of light?
Reflection is the process by which electromagnetic radiation is returned either at the boundary between two media (surface reflection) or at the interior of a medium (volume reflection), whereas transmission is the passage of electromagnetic radiation through a medium. Both processes can be accompanied by diffusion (also called scattering), which is the process of deflecting a unidirectional beam into many directions. In this case, we speak about diffuse reflection and diffuse transmission (Fig. II.14). When no diffusion occurs, reflection or transmission of an unidirectional beam results in an unidirectional beam according to the laws of geometrical optics (Fig. II.15). In this case, we speak about regular reflection (or specular reflection) and regular transmission(or direct transmission). Reflection, transmission and scattering leave the frequency of the radiation unchanged. Exception: The Doppler effect causes a change in frequency when the reflecting material or surface is in motion.Absorptionis the transformation of radiant power to another type of energy, usually heat, by interaction with matter.Fig. II.14 - a-c: Direct, mixed and diffuse reflection d-f: direct, mixed and diffuse transmissionFig. II.15 - When directly reflected or directly transmitted, an unidirectional beam follows the laws of geometrical optics: direct reflection (left): ain = aout, direct transmission (right): n1 · sin(ain) = n2 · sin(aout) with n1 and n2 denoting the respective medium´s index of refractionII.8.a. Reflectance r, Transmittance t, and AbsorptanceaIn general, reflection, transmission and absorption depend on the wavelength of the affected radiation. Thus, these three processes can either be quantified for monochromatic radiation (in this case, the adjective "spectral" is added to the respective quantity) or for a certain kind of polychromatic radiation. For the latter, the spectral distribution of the incident radiation has to be specified. In addition, reflectance, transmittance and absorptance might also depend on polarization and geometric distribution of the incident radiation, which therefore also have to be specified.Thereflectance r is defined by the ratio of reflected radiant power to incident radiant power. For a certain area element dA of the reflecting surface, the (differential) incident radiant power is given by the surface's irradiance Ee, multiplied with the size of the surface element, thusdFe,incident = Ee dAand the (differential) reflected radiant power is given by the exitance Me, multiplied with the size of the surface element:dFe,reflected = Me dAThus,orMe = r EeTotal reflectance is further subdivided in regular reflectance rr and diffuse reflectancerd, which are given by the ratios of regularly (or specularly) reflected radiant power and diffusely reflected radiant power to incident radiant power. From this definition, it is obvious thatr = rr + rdThe transmittance t of a medium is defined by the ratio of transmitted radiant power to incident radiant power. Total transmittance is further subdivided in regular transmittance tr and diffuse transmittance td, which are given by the ratios of regularly (or directly) transmitted radiant power and diffusely transmitted radiant power to incident radiant power.Again,t = tr + tdThe absorptance a of a medium is defined by the ratio of absorbed radiant power to incident radiant power.Being defined as ratios of radiant power values, reflectance, transmittance and absorptance are dimensionless.Quantities such as reflectance and transmittance are used to describe the optical properties of materials. The quantities can apply to either complex radiation or to monochromatic radiation.The optical properties of materials are not a constant since they are dependent on many parameters such as:• thickness of the sample• surface conditions• angle of incidence• temperature• the spectral composition of the radiation (CIE standard illuminants A, B, C, D65 and other illuminants D)• polarization effectsThe measurement of optical properties of materials using integrating spheres is described in DIN 5036-3 and CIE 130-1998.Descriptions of the principle measurements are presented in paragraph III.1.f below.II.8.b. Radiance coefficient qe, Bidirectional reflectance distribution function (BRDF)The radiance coefficient qe characterizes the directional distribution of diffusely reflected radiation. In detail, the radiance coefficient depends on the direction of the reflected beam and is defined by the ratio of the radiance reflected in this direction to the total incident irradiance. In general, the reflected radiance is not independent from the directional distribution of the incident radiation, which thus has to be specified.In the USA, the concept of Bidirectional reflectance distribution function BRDF is similar to the radiance coefficient. The only difference is that the BRDF is a function of the directions of the incident and the reflected beam (Fig. ). In detail, the (differential) irradiance dEe impinging from a certain direction causes the reflected radiance dLe in another direction, which is given bydLe = BRDF · dEeThis BRDF depends on more arguments than the radiance coefficient. However, its advantage is the simultaneous description of the material's reflection properties for all possible directional distributions of incident radiation, whereas the radiance coefficient generally is valid for just one specific directional distribution of incident radiation.The unit of radiance coefficient and BRDF is 1/steradian. The BRDF is often abbreviated by the Greek letter ñ, which bears the danger of mixing the BRDF up with reflectance (see foregoing paragraph).Fig. II.16 - Geometry used for the definition of the bidirectional reflectance distribution function (BRDF). The BRDF depends on the directions of incident and reflected radiation, which are given by the angles Ji and Jr, which are measured relative to the reflecting surface's normal, and the azimuth angles ji and jr, which are measured in the plane of the reflecting surface.
What happens to the direction of light in which it travels during reflection?
it goes in a different direction:>
What happens to light when its reflected?
According to law of reflection, the angle of incidence and angle of reflection are equal. If the incident surface is smooth specular reflection takes place where the light is reflected in a single direction.
How do you compare reflection refraction and dispersion?
You can compare it by saying that each of them occur when a light transfers through one meduim to another. That's one way of explaining it.That is incorrect :( It happens when light is shone onto or through a different medium. Reflection happens when light is shone ONTO a mirror, you cant shine light THROUGH a mirror.
What happens when the angle of incidence is greater than the critical angle?
You get total internal reflection. That is, the incident beam bounces off the interface back into the medium.
What happens to the angle of reflected light rays as the angle of incident light rays becomes steeper?
The angle of incidence equals the angle of reflection. Therefore, if your angle of incidence is 15 degrees, your angle of reflection equals that also. If it is 45 degrees, your angle of reflection is also 45 degrees, and so on.
What is the bouncing of light off an object?
Reflection
What happens to the graph as the coefficient increases?
Most graphs will become steeper as the coefficient increases.
Differentiate regular reflection from diffuse reflection?
Regular Reflection= Happens when light reflects off a smooth surface. Diffuse Reflection= Happens when light reflects off a rough surface. Reflection= The bouncing of waves, off a surface or and object
What are the types of reflection?
There's specular reflection, which is the reflection from a surface made of a non-absorbing, non-porous material. Conceptually, this is the type of reflection you get from mirrors and glass and other shiny things.Then there's diffuse reflection, which is the reflection from a surface made of a porous material. The incident light is able to penetrate the surface of a porous material where it then scatters around the material's structural lattice until it finally reflects back out at some random angle. Conceptually, this is the type of reflection that happens on everything but SUPER shiny surfaces. Even mirrors and glass undergo some diffuse reflection.Regular Reflection and Diffuse Reflection.
What happens when the temperature of a forward biased diode is increased?
What happens depends on the temperature coefficient of the diode. If that diode has a positive temperature coefficient, it resistance increases with increased temperature. A diode with a negative temperature coefficient does the opposite.
What happens to coefficient of friction when surfaces get hot?
It depends on the material.
Reflection happens in concave mirrors?
in concave and convex mirrors refraction happens
What type of reflection happens when a straight ray of light hits smooth mirrors?
When a straight light ray hits a smooth mirror, the regular reflection happens.
