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Measure Light Intensity using Light Dependent Resistor (LDR) The resistance of the Light Dependent Resistor (LDR) varies according to the amount of light that falls on it. The relationship between the resistance RL and light intensity Lux for a typical LDR is RL = 500 / Lux Kohm With the LDR connected to 5V through a 3.3K resistor, the output voltage of the LDR is Vo = 5*RL / (RL+3.3) Reworking the equation, we obtain the light intensity Lux = (2500/Vo - 500)/3.3 For a low cost LDR, at the same light intensity, the part to part variation in resistance can be as high as 50%. Therefore such a low cost LDR is seldom used for measuring light intensity but more for light presence/absence detection.
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What do you mean by intencity?
how high or low the pitch is
What is the function of bulb in frequency of ac mains by electrically vibrating rod?
to ensure circuit is complete and frequency is proportional to intencity and glowing bulb show intencity
What can scientist measure when light rays are emmitted by a moving source?
Scientist measure when light rays are emitted by a moving source the speed of light. Depending on the moving force they can also measure bending light.
The intensity of light waves is a measure of what?
The intensity of light waves is a measure of the energy that is carried by the waves. Light waves are electromagnetic waves.
What does a spectrometer measure?
A spectrometer measures properties of light of a specific part of the wavelength. It is often used to measure the intensity of a light.
What is intencity of light?
It is luminous intensity measured in candelas
What is the richtor scale?
the scale used to measure the intensity of earthquakes
What do you mean by intencity?
how high or low the pitch is
What is the function of bulb in frequency of ac mains by electrically vibrating rod?
to ensure circuit is complete and frequency is proportional to intencity and glowing bulb show intencity
Who try to measure the speed of light?
Roemer was the first to measure the speed of light.
What can scientist measure when light rays are emmitted by a moving source?
Scientist measure when light rays are emitted by a moving source the speed of light. Depending on the moving force they can also measure bending light.
The intensity of light waves is a measure of what?
The intensity of light waves is a measure of the energy that is carried by the waves. Light waves are electromagnetic waves.
Can you measure lighting?
You can measure light by:The lumen (symbol: lm) is the SI unit of luminous flux, a measure of the power of light perceived by the human eye.orA light meter is a device used to measure the amount of light.You measure a lighting fixture with a ruler, too
How would you measure the speed of light?
Light years
What is a light measure in?
watts
A what is used for what?
to measure light
Why do scientists measure light intensity?
to know how is the light heavy
