Light and Illuminance Quiz

Illuminance is the amount of light incident on a surface, referring to the intensity of light per unit area. It is measured by the normal luminous flux per unit area received by it.

Reflectance (P), also known as Reflection Factor or Coefficient of Reflection, is given by the ratio of luminous flux reflected from a small area of a surface to the total flux incident upon it.

Transmittance (T) is defined as the ratio of the total luminous flux transmitted to it to the total flux incident on it.

<p>Absorptance (A) is the ratio of the light absorbed versus the light striking the surface.</p> Signup and view all the answers

<p>Utilization factor is the ratio of the lumens actually received by a particular surface to the total lumens emitted by the luminous source.</p> Signup and view all the answers

<p>The amount of light leaving an object</p> Signup and view all the answers

<p>The ratio of light transmitted to the total incident flux</p> Signup and view all the answers

<p>The ratio of lumens actually received by a particular surface to the total lumens emitted by the luminous source</p> Signup and view all the answers

<p>The ratio of luminous flux reflected from a surface to the total incident flux</p> Signup and view all the answers

<p>The intensity of light per unit area</p> Signup and view all the answers

<p>The intensity of light per unit area</p> Signup and view all the answers

<p>The amount of light leaving an object</p> Signup and view all the answers

<p>The ratio of the lumens actually received by a particular surface to the total lumens emitted by the luminous source</p> Signup and view all the answers

<p>The ratio of luminous flux reflected from a small area of a surface to the total flux incident upon it</p> Signup and view all the answers

<p>The ratio of the total luminous flux transmitted to it to the total flux incident on it</p> Signup and view all the answers