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Distinguish between a luminous source and an illuminated source?
A luminous source produces its own light, like the sun or a light bulb. An illuminated source does not produce light but reflects light from a luminous source, such as the moon reflecting sunlight.
Is a light bulb luminous ojbect or an illuminated object?
A light bulb is a luminous object because it produces its own light through the process of converting electrical energy into light energy. An illuminated object is one that reflects light from another source.
Theoretically What is the maximum possible luminous efficacy?
683 lm/w for a pure monochromatic green light source at a single wavelength of 555 nm. This is because a lumen (lm) is measured according to sensitivity of the human eye and the eye is most sensitive at 555 nm. For a wide-spectrum "white" light source, the theoretical maximum is about 280 lm/W if the luminous energy is evenly spread across the visible spectrum. The number can vary slightly depending on the limits chosen for the visible spectrum and how white light is defined.
Is a flashlight luminous or illuminated?
A flashlight is considered illuminated because it emits light due to an internal power source (battery). Luminous objects generate their own light without requiring an external source.
How the motion and frequency of a wave source affects the waves that source produces?
The motion of a wave source affects the wavelength and amplitude of the waves it produces. A moving source can either compress or expand the waves it emits, leading to a change in frequency, called the Doppler effect. A higher frequency is produced by a faster-moving source, resulting in a higher pitch in sound waves or a shift towards the blue end of the spectrum in light waves.
Distinguish between a luminous source and an illuminated source?
A luminous source produces its own light, like the sun or a light bulb. An illuminated source does not produce light but reflects light from a luminous source, such as the moon reflecting sunlight.
What is self luminous source?
A self-luminous source is an object that produces its own light through a process like combustion or nuclear fusion, as opposed to reflecting light like non-luminous objects. Examples include stars, light bulbs, and fireflies.
Is an ordinary frosted incandescent bulb a luminous or an illuminated source?
An ordinary frosted incandescent bulb is a luminous source because it produces light through its own incandescent filament. It does not rely on external light sources to produce light.
What are the example of luminous materials?
Examples of luminous materials include glow-in-the-dark paint, fluorescent stickers, phosphorescent materials, and bioluminescent organisms. These materials emit light through processes such as fluorescence, phosphorescence, or bioluminescence when stimulated by an external light source or energy.
What is a luminous light source?
Luminous light is a light source but another name for it.
Which bunsen burner luminous or non luminous flame used in laboratory and why?
A non-luminous flame is typically used in laboratory settings when using a Bunsen burner. This flame produces a more controlled and homogeneous heat source, making it ideal for processes like heating, sterilizing, and combustion analysis. The non-luminous flame also produces less soot and is more energy efficient compared to a luminous flame.
What is non luminous source?
It is a source which does not produce light.
Why a luminous flame is not used as a source of heat in a laboratory experiment?
A luminous flame produces soot, which can contaminate the experiment or react with chemicals being used. In addition, the temperature of a luminous flame is not as high or consistent as a non-luminous flame, making it less suitable for precise heating applications in a laboratory setting.
Is a light bulb luminous ojbect or an illuminated object?
A light bulb is a luminous object because it produces its own light through the process of converting electrical energy into light energy. An illuminated object is one that reflects light from another source.
Why sun called luminous?
The Sun is called luminous because it emits light and heat through a process called nuclear fusion in its core. This process produces energy that radiates outwards, making the Sun the most prominent source of light in our solar system.
Theoretically What is the maximum possible luminous efficacy?
683 lm/w for a pure monochromatic green light source at a single wavelength of 555 nm. This is because a lumen (lm) is measured according to sensitivity of the human eye and the eye is most sensitive at 555 nm. For a wide-spectrum "white" light source, the theoretical maximum is about 280 lm/W if the luminous energy is evenly spread across the visible spectrum. The number can vary slightly depending on the limits chosen for the visible spectrum and how white light is defined.
Does a luminous object produce its own light?
Yes, a luminous object produces its own light through a process like combustion or nuclear fusion, generating energy that emits as visible light. On the other hand, non-luminous objects only reflect light from an external source.
