What is the origin of the idiom "cast a shadow over something" and when to use it?

The idiom "cast a shadow over something" is rooted in the idea that when an object or obstacle blocks the light, it creaThe negative review of the film cast a shadow on the opening weekend's box office results.tes a shadow or cloud, which can obscure visibility and cast a dark or negative influence. It is used to describe a situation where something, such as an event or action, has a detrimental or negative impact on a particular circumstance, often making it gloomy or causing concerns.