radiant intensity

J is the spectral power distribution of the radiant intensity.

For example, radiant intensity can be measured in watts per steradian (W sr-1).

Light with the same radiant intensity at other wavelengths has a lower luminous intensity.

A spectral plot represents radiant intensity versus wavelength at an instant in time.

The number of scattered particles per solid angle per time (the radiant intensity), is therefore well defined.

These quantities are sometimes called intensity, but this usage leads to confusion with radiant intensity, which has different units.

At other frequencies, more radiant intensity is required to achieve the same luminous intensity, according to the frequency response of the human eye.

A radiometric plot represents the radiant intensity versus time; there can be plots at multiple bands or wavelengths.

In radiometry, radiant intensity is a measure of the intensity of electromagnetic radiation.

Electro-optical techniques include measurement of the radiant intensities, dynamic motion, and the materials composition of a target.

Radiant intensity, power per unit solid angle (W/sr)

Luminous intensity is also not the same as the radiant intensity, the corresponding objective physical quantity used in the measurement science of radiometry.

The SI unit of radiant intensity is watts per steradian (W sr).

Wien's displacement law determines the most likely frequency of the emitted radiation, and the Stefan-Boltzmann law gives the radiant intensity.

Luminous intensity (photometric) and radiant intensity (radiometric)

The term can refer to any of irradiance, luminous intensity, radiant intensity, or radiance, depending on the background of the person using the term.

(Readers unfamiliar with the term irradiance might prefer the word intensity, or even Radiant intensity but the terms are not correctly interchangeable.)

Radiant intensity is distinct from irradiance and radiant exitance, which are often called intensity in branches of physics other than radiometry.

Defining luminous intensity and luminance, and the correspondent radiometric quantities radiant intensity and radiance.

A collection of "fugivite pieces . . . a famous writer's occasional writings and ephemera," infused with a "radiant intensity."

Realistically, the radiant intensity from emitted radiation, , and the intensity of reflected radiation, , are both functions of angle from the surface.

The diameter of the near-field radiation pattern is defined here as the full width at half maximum and the radiation angle at half maximum radiant intensity.

For Lambertian surfaces, the same factor of relates luminance to luminous emittance, radiant intensity to radiant flux, and radiance to radiant emittance.

Two fairly successful examples of defining the infrared signature of an object are the apparent temperature difference at the sensor and the contrast radiant intensity (CRI) definitions.

Alma Potschke, hybridized in Germany, blooms early and has almost passed its peak now, but it lingers in the mind for the radiant intensity of its huge crop of vibrant raspberry-rose flowers.