A measure of light leaving a surface. Illuminance Illumination Luminance Luminou
ID: 50829 • Letter: A
Question
A measure of light leaving a surface.
Illuminance
Illumination
Luminance
Luminous flux
Luminous intensity
Reflectance
A eye that focuses light on a point that would be past the retina is
myopic
hyperopic
presbyopic
astigmatic
A measure of the amount of light reaching an object.
Illuminance
Illumination
Luminance
Luminous flux
Luminous intensity
Reflectance
Unit of measure is candela/meter2
Illuminance
Illumination
Luminance
Luminous flux
Luminous intensity
Reflectance
Achromatic light is
light of only one hue.
light without any dominate hue.
light from an indirect source.
one of the three primary colors of light.
Illuminance
Illumination
Luminance
Luminous flux
Luminous intensity
Reflectance
A eye that focuses light on a point that would be past the retina is
myopic
hyperopic
presbyopic
astigmatic
Explanation / Answer
Answer 1. Option 3- Luminance
Luminance is the measure of light emitted or reflected through a particular surface and having a solid angle. S.I. unit of luminance is candela per metre2 (cd/m2).
Answer 2. Option 2 - Hyperopia
Hyperopia is also known as foresightedness. This is a common problem in which distance between lens and retina is short the light rays reaches retina before focusing and thus focus on a point past retina. People suffering with Hyperopia are able to see the distant objects clearly most of the time but face problem in seeing close objects.
Answer 3. Option 1- Illuminance
Illuminance is the amount of light reaching a particular surface. The unit of measurement for illuminance is lux.
Lux = lumens/metre2
Answer 4. Option 3- Luminance
Candela/ metre2 are the measurement unit of luminance.
Answer 5. Option d- one of the three primary colors of light
Achromatic light is a colorless light consisting mainly of three primary colors black, grey and white.
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