lighting mp

What illuminance is most suitable for the general book stacks in a high school library?

B

Illuminance levels and illuminance categories are used to:

C

The relationship between brightness and luminance can best be described in the following way: (a) luminance is the amount of light falling on a surface and brightness is the amount of light reflected towards the eye (b) both are terms used to describe light coming off of an object, however brightness is subjective and luminance is measurable (c) brightness and luminance are the same thing (d) brightness can be perceived while luminance cannot

B

Illuminance is measured more frequently than luminance because: (a) photometric luminance cannot be seen by the human eye (b) illuminance is a factor in glare considerations (c) design recommendations for lighting levels are typically given in terms of illuminance (d) luminance meters are cheaper and easier to use than illuminance meters

C

The SI unit of luminous intensity is the: (a) lumen (b) flux (c) candela (d)lux

C

Illuminance is best defined as: (a) the lighting power that it takes to maintain user comfort (b) the density of luminous energy, expressed as lumens per unit area (c) a measure of photometric power, expressed as the time rate flow of perceived luminous energy. (d)a measure of the degree of diffusion of a concentrated beam of light through a translucent surface

B

The relationship between illuminance and luminance for an opaque surface is best described as: (a) luminance and illuminance are numerically identical (b) luminance and illuminance have the same magnitude, but opposite signs (c) luminance is illuminance as modified by reflectance (d)luminance and illuminance are not at all related in this situation

C

When a light source produces energy over the entire visible spectrum in approximately equal quantities, the light appears as: (a) blue (b) green (c) orange (d) white

D