Rainy Day: Black Clouds and Light

In summary, the conversation discusses the appearance of clouds on a rainy day and the potential reasons for their dark color. It is suggested that the lack of light may make clouds look grey or black, and that thicker clouds may absorb more light, making them appear darker. However, it is also mentioned that clouds are typically white due to their scattering and reflection of light. Additionally, the role of water in cloud color is discussed, with some suggesting that thicker clouds scatter more light while others argue that light must pass through the cloud.
  • #1
shihab-kol
119
8
During a rainy day the clouds appear black but not so normally (in good climatic conditions)
I think its something to do with light so I posted this query .
If its not, sorry.
 
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  • #2
No need to say sorry for a good question !
I'm not an expert, but I think that indeed the lack of light makes clouds look grey or even black.
Clouds are very fine sprays of minute water droplets that scatter light like crazy. With enough light they scatter a lot of light back to observers.
 
  • #3
All clouds are white(again, black is not a color), but thicker clouds absorb more light, making them darker.
 
  • #4
russ_watters said:
All clouds are white(again, black is not a color), but thicker clouds absorb more light, making them darker.

Isn't it that thicker clouds scatter more light?
 
  • #5
pixel said:
Isn't it that thicker clouds scatter more light?
It's probably some of both. Looking down at clouds from above, they are bright white from scatter/reflection. Looking up from below, the light you see must have been transmitted through.
 
  • #6
Water doesn't absorb much light. But scattering increases with cloud density and thickness, reducing the amount of light that makes it through.
 

1. What causes black clouds on a rainy day?

Black clouds on a rainy day are typically caused by a large amount of water vapor in the air, which is a sign of an upcoming storm. The clouds appear dark because they are thick and block sunlight from passing through.

2. Why do some rainy days have lighter clouds?

Lighter clouds on a rainy day are usually associated with a lighter or less intense rain. This could be due to a smaller amount of water vapor in the air or a less severe storm system. It could also be a sign of a passing shower rather than a prolonged rain event.

3. Are rainy days with black clouds more likely to have thunder and lightning?

Yes, black clouds on a rainy day are often associated with more severe storms and are more likely to have thunder and lightning. This is because the dark clouds indicate a higher concentration of water vapor and potentially stronger updrafts, which can lead to the formation of thunderstorms.

4. Can black clouds on a rainy day be dangerous?

In some cases, black clouds on a rainy day can be a sign of a dangerous storm with heavy rain, strong winds, and potential for lightning strikes. It is important to take caution and seek shelter during these types of storms to stay safe.

5. How do scientists predict and track black clouds on a rainy day?

Scientists use weather forecasting models and satellite imagery to predict and track black clouds on a rainy day. They also use radar technology to monitor the movement and intensity of storms. This data is constantly monitored and updated to provide accurate and timely weather forecasts.

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