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How does light intensity vary with distance form the source?
Light intensity is inversely proportional to the square of the distance: I = k/d2
What is the scientific definition for intensity?
Intensity is proportional to the square of the amplitude of vibration in case of mechanical wave such as sound waves But in case of light which is electromagnetic in nature, the intensity is the number of photons crossing unit area in one second
How does the amplitude affect the energy of a wave?
The intensity will increase if the energy increase. The intensity is proportional to the square of the amplitude of a wave.
Does the intensity of a wave increases when its amplitude decrease?
Intensity of a wave is proportional to the square of its amlitude so it should decrese when the amplitude is decreased.
Why in coulomb's law for charges force is inversely proportional to square of distance between charges?
Imagine a light bulb in the center of a sphere. It emits a fixed quantity of light. That's how much light will reach the sphere. The concentration of light per unit of area, on the sphere, will depend upon how large the sphere is. And the area of a sphere is proportional to the square of the radius of the sphere. So the intensity of the light will be inversely proportional to the square of the distance which it has to travel. It is effectively illuminating a larger sphere (even if there is no actual sphere, the principle remains the same).
How does light intensity vary with distance form the source?
Light intensity is inversely proportional to the square of the distance: I = k/d2
What determines the resistance of a photoresistor?
The resistance of a photoresistor is inversely proportional to the intensity of the light on it.
Does kinetic energy of photo electron depend upon intensity of light?
No. Kinetic Energy of a photon depends only on the frequency of the light (or in other words frequency of the photons which the light comprises of). Intensity of light, on the other hand, is a way to talk about how many photons are there in, say, a beam of light (putting it in simple words)!
What is the scientific definition for intensity?
Intensity is proportional to the square of the amplitude of vibration in case of mechanical wave such as sound waves But in case of light which is electromagnetic in nature, the intensity is the number of photons crossing unit area in one second
In the Photoelectric effect after the threshold frequency what effect does the increased frequency have on the photocurrent If you assume the Intensity of the source to be constant?
The increased frequency increases the kinetic energy of the single electron ejected. Remember that the incident light releases a single electron when the threashod frequency is reached
A amplitude of a wave related to?
Amplitude is related to the intensity because square of the amplitude is proportional to the intensity of the wave.
How does light intensity affect the rate of photosynthesis?
Higher light intensity increases the rate of photosynthesis and vice versa.more intense light means more energy in the light, so the chloroplasts get more energy from light, making photosynthesis go faster
How does the amplitude affect the energy of a wave?
The intensity will increase if the energy increase. The intensity is proportional to the square of the amplitude of a wave.
What is the light intensity in the arctic?
The light intensity is poop!
How is laser light different from incandescent light?
The intensity of light from most light sources is inversely proportional to the square of the distance from the source. So the intensity two meters from an incandescent lamp is one quarter of the intensity at one meter, and at three meters from the lamp the intensity is one ninth of the intensity at one meter. Laser light ideally has the same intensity at any distance.
Why is it easiest to see mars when it is closer to earth?
Because it will appear larger, and it will thus (and also because its closer) appear brighter. Remember that the intensity of light perceived is proportional to the surface area of the emitter, and inversely proportional to the square of the distance to the emitter.
How does amplitude affect sound?
Amplitude decides the intensity (loudness) of the sound. Intensity is directly proportional to the square of the amplitude of vibration.
