# Questions tagged [intensity]

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### Photoelectric effect with high frequency and low intensity of light [closed]

What happens to the number of photons striking the free electrons on metal surface with high frequency and low intensity of light? High and low intensity of light of photons to electron on metal ...
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### Relation between Displacement Amplitude and Intensity of Sound Waves

How do we derive a relation between the displacement amplitude and the intensity of a sound wave? I saw a formula on the internet regarding the same i.e But I can't find a way that would help me in ...
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### Wine color vs. quantity

Looking down at red wine in a glass, if the quantity of wine is doubled, the color darkens. Is there an equation that describes how the color changes as the quantity of wine is increased? Is it ...
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### How to calculate charge density [closed]

I am trying to solve this exercise: Using this formula calculate electric intensity $$\vec{E} = \frac{\vec{c}\times \vec{r}}{r^4}$$ $\vec{c}$ is constant vector, $r$ is magnitude of the position ...