Why do we see bright circular patches of light on the on the ground under a tree in a sunny day?

The bright circular patches of light on the ground under a tree are caused by sunlight filtering through the leaves. When sunlight passes through the gaps in the leaves, it creates a pattern of light and shadow on the ground, often resulting in circular spots due to the shape of the leaves and their arrangement. Additionally, the presence of moisture or dew on the ground can enhance the brightness of these patches. This phenomenon is known as "dAppled sunlight."