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How many lumens is 1 candle?
One candle, in terms of luminous intensity, is defined as 1 candela. In terms of lumens, which measures total light output, 1 candela is approximately equivalent to 12.57 lumens when emitted uniformly in all directions. However, the exact lumen output can vary based on the directionality and distribution of the light source.
What is antumbra?
The antumbra is the region of a shadow that is partially shaded and partially illuminated by a light source, such as during a solar eclipse when the moon does not entirely cover the sun. It is the area where the light source is not completely blocked, creating a dimmer shadow than the umbra.
What is the difference between luminous flux and lumens, and how do they affect the brightness of a light source?
Luminous flux is the total amount of light emitted by a source in all directions, while lumens measure the amount of light that is actually perceived by the human eye. The higher the luminous flux or lumens, the brighter the light source will appear to us.
How many light years is Callisto from the sun?
Callisto, one of Jupiter's moons, is about 481 million miles away from the sun. In terms of light-years, it is roughly 0.000005 light-years from the sun.
How old will you be when you get to the sun in light years?
I will not be able to reach the sun in terms of light years as it is within our own solar system. However, light from the sun takes about 8 minutes to reach Earth so you could say it would take about 8 minutes in terms of light years to "reach" the sun.
What is illumination in terms of light?
when objects get lighted from other source of light it is known as illumination
What is the difference between light source and an illuminant?
The terms light source and illuminant have precise and different meanings. A light source is a physical emitter of radiation such as a candle, a tungsten bulb, and natural daylight. An illuminant is the specification for a potential light source. All light sources can be specified as an illuminant, but not all illuminants can be physically realized as a light source.
What is the conversion factor from lux to watt and how can it be used to determine the power consumption of a light source in terms of lux?
The conversion factor from lux to watt depends on the efficiency of the light source. It can be used to determine the power consumption of a light source in terms of lux by multiplying the lux value by the conversion factor to get the power consumption in watts.
How do flame-like light bulbs differ from traditional light bulbs in terms of appearance and functionality?
Flame-like light bulbs differ from traditional light bulbs in appearance by resembling a flickering flame, while traditional light bulbs have a standard bulb shape. In terms of functionality, flame-like light bulbs are designed to mimic the look of a flame and create a cozy ambiance, while traditional light bulbs provide consistent and uniform lighting.
Which of these terms can be defined as a plant's response to light?
Phototropism refers to a plant's response to light, where the plant grows toward or away from a light source.
Is light attracted to light?
In terms of physics, No (because light "interferes" with light from another "source" , creating interference patterns). However "lighting bugs" DO use light to attract a mate!
What is the difference between lux and nits in terms of measuring brightness?
Lux and nits are both units of measurement for brightness, but they measure different aspects of light. Lux measures the amount of light that falls on a surface, while nits measure the brightness of a light source itself. In simpler terms, lux measures how bright the light is on a surface, while nits measure how bright the light source itself is.
What two terms describe objects from which light is provided?
Luminous objects are sources that emit light, while illuminated objects are those that reflect or scatter light from a different source.
What is the power of light equation and how does it relate to the intensity of light emitted by a source?
The power of light equation is P I A, where P is power, I is intensity, and A is area. This equation shows that the power of light emitted by a source is directly proportional to the intensity of light and the area over which the light is spread. In simpler terms, the more intense the light and the larger the area it covers, the greater the power of light emitted.
What is a polar curve in terms of illumination?
The term "polar curve", in relation to the subject of illumination refers to the spread of light from a source. If the curve is weak, then little illumination is provided, whilst the opposite is true for a strong curve.
Where would be the intensity higher?
To determine where the intensity would be higher, one would need to consider the context, such as sound, light, or energy. For instance, in sound, intensity is higher closer to the source of the sound. In terms of light, intensity is greater near the light source and decreases with distance. Generally, intensity diminishes with increasing distance from the source in most physical phenomena.
What is the difference between a lumen and a candela?
The candela measures luminous intensity, whereas the lumen measures luminous flux. In simple terms, you can think of luminous intensity as being similar to 'brightness', while luminous flux is similar to the rate at which light leaves its source.
