In photometry, illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of how much the incident light illuminates the surface, wavelength-weighted by the luminosity function to correlate with human brightness perception.
Example: Both dawns had a maximum illuminance of 275 lux. Can be used to determine the direct illuminance on a plane.
pt_br: iluminância
Light In a straight line
Phrase
The Rectilinear Propagation of Light describes that Light travels in a Straight Line. A mirror changes the direction of Light that falls on it and it travels in a Straight line Path. Reflection of Light occurs when light bounces off a polished surface.
Example: In an atmosphere which is bit dusty, we can see light traveling in a straight line.
pt_br: Luz em linha reta
Luminance
noun
Luminance is the luminous intensity, projected on a given area and direction. Luminance is an objectively measurable attribute. The unit is 'Candela per Square Meter' (cd/m2).
Example: This allows corrected LUMINANCE values for each colour to be calculated
pt_br: Luminância
Non-luminous object
Phrase
Objects that cannot emit light energy by themselves are known as non-luminous objects. These objects can cause a sensation of light. These objects do not cause the sensation of light. The luminous objects are visible as they emit light on their own
Example: The planet is not a luminous object only the stars.
pt_br: Objetos não luminosos
Opaque
Adjective
Blocking the passage of radiant energy and especially light.
Example: Materials such as wood, stone, and metals are opaque to visible light.
pt_br: opaco
Reflection
noun
Is an image produced by or as if by a mirror.
Example: the first Moufang law [CS2003]. We recall that a REFLECTION in a vector x is expressed.
pt_br: Reflexão
Refraction
noun
deflection from a straight path undergone by a light ray or energy wave in passing obliquely from one medium (such as air) into another (such as glass) in which its velocity is different.
Example: Stepping back, the student could see the refraction of light as it moved through the beaker
pt_br: Refração
Shadow
noun
Partial darkness or obscurity within a part of space from which rays from a source of light are cut off by an interposed opaque body.
Example: An example of shadow is a pitch dark alley from where a scary figure emerges.
pt_br: Sombra
Translucent
Adjective
Translucent means “permitting light to shine through.” Be careful of how you use transparent and translucent.
Example: Materials like frosted glass and some plastics are called translucent.
pt_br: Translúcido
Trasparent
Adjective
Having the property of transmitting light without appreciable scattering so that bodies lying beyond are seen clearly.
Example: Glass, for example, is transparent to all visible light.
