Light Sources and Lighting Terminology Quiz

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What is the primary function of a work plane in lighting design?

To generate light energy

To reflect incident illumination

To provide a surface for visual tasks (correct)

To measure light brightness

In lighting design, what is the role of a primary source?

To derive brightness from reflected incident illumination

To be artificial light source

To generate light energy directly to a task (correct)

To reflect light from a shiny surface

Which of the following correctly describes a secondary source in lighting?

Reflects light from a shiny surface

Derives brightness from reflected incident illumination (correct)

Generates light energy directly to a task

Artificial light source

What distinguishes bulbs from tubes in the context of lamps?

Light generation mechanism Signup and view all the answers

What type of lamp falls under the category of H.I.D.?

High-Intensity Discharge lamp Signup and view all the answers

What term is used to describe the bending of a ray of light as it passes obliquely through a material?

Refraction Signup and view all the answers

Which type of light transmission involves light being scattered evenly in all directions, appearing equally bright from any angle of view?

Diffuse Transmission Signup and view all the answers

What term is used to describe the ratio of light transmitted through a material to the total incident light falling on it?

Luminous Transmittance Signup and view all the answers

What unit is used to quantitatively measure brightness, serving as an index of the intensity of light being emitted, transmitted, or reflected from a surface?

Footlambert (FL) Signup and view all the answers

What term is used to describe materials that transmit light in a diffuse pattern and scatter light evenly in all directions?

Translucent Materials Signup and view all the answers

What is the term used to describe the ratio of light absorbed by a material to the incident light falling on it?

Absorptance Signup and view all the answers

Which type of reflection is observed in a mirror, where the angle of reflection is equal to the angle of incident light?

Specular reflection Signup and view all the answers

What is the term used to describe the ratio of light reflected by a surface to the incident light falling on it?

Reflectance coefficient Signup and view all the answers

In lighting design, which type of lamp produces 'diffuse reflection,' scattering light in all directions?

Fluorescent lamp Signup and view all the answers

What is the term for rays that travel in a straight line until they encounter an object?

Lights Signup and view all the answers

Which property determines how bright a reflecting surface appears from any angle of view?

Reflectance coefficient Signup and view all the answers

What is the purpose of a reflector in a lighting unit?

To redirect the radiant energy of the lamp in a desired direction Signup and view all the answers

Which type of lighting provides overall illumination to an area?

General lighting Signup and view all the answers

What does efficacy measure in lighting units?

Light output to power input ratio Signup and view all the answers

In lighting design, what is the function of a refractor?

To refract light through a lens in a desired direction Signup and view all the answers

Which type of lighting increases light levels over the work and immediate surroundings?

Task lighting Signup and view all the answers

What is the primary role of a luminaire in a lighting unit?

To position, distribute light, protect the lamp, and connect it to a power supply Signup and view all the answers