They do cast shadows.
Birds flying up in the sky do not cast their shadow because the source of light (sun) is too large compared to the object (bird) and the umbra of the shadow formed on the screen (ground) is very small, negligible.So it is tough to see its shadow on the ground. (P.S. If this is a VNS student reading this for Physics research, then I'm pretty sure you're in my grade and you know who I am)
The birds flying in the sky do not cast their shadow on the earth because the umbra is absent and the penumbra is too large and too faint that it is not visible as the distance of the earth is very large from the bird.
Flying birds do cast shadows. It's just that the distance from the earth makes them barely visible.
High-flying planes cast a little shadow because they are farther away from the ground, so the angle of light from the sun spreads out over a larger area, resulting in a diffuse shadow. In contrast, low-flying planes are much closer to the ground, causing the sunlight to create a more defined and sharper shadow due to the smaller distance between the plane and the surface. The altitude affects the size and clarity of the shadow based on the light's angle and the proximity to the ground.
when an object is closer to the light source,the larger and fuzzier is the shadow.also if the object is moved away from the screen,the shadow is fuzzier.therefore the bird which is close to sun and away from the ground casts a fuzzier shadow in the atmosphere which cannot be seen
No, a reflection itself cannot cast a shadow. A reflection is the result of light bouncing off a surface, while a shadow is created when an object obstructs light from reaching a surface. However, the object causing the reflection can cast a shadow if it blocks light in the process.
The cast of Flying with the Angels - 1998 includes: Nancye Ferguson as Woman Arabella Holzbog as Female Shadow Jonathan Penner as Man
The shadow is there, but it is 'diluted' until practical invisibleness; spreading over a very big area and proportionally becoming lighter. Projection is a keyword here: The shadow is projected unto the nearest surface. If it is very close, the shadow is very dark. But there is only that much 'darkness' in a shadow. If the object is moved farther from the surface (e.g. the bird flying higher) the shadow becomes bigger, but less dense. The shadow is diluted until invisibleness, the smaller the rising bird, the faster. Try throwing an object up in the air in sunshine and see the effect. This explanation is true, but get a physics teacher explain it more scientifically correct.
Objects do cast shadows at higher altitudes in the same way they do on the ground; however, the shadow may not be visible due to the lack of contrast against the sky. Additionally, the position of the sun in the sky and the angle at which light is hitting the object can also affect the visibility of the shadow.
Predatory birds often cast shadows. Many other animals interpret all shadows as a threat to them, and flee.
If you're standing on the ground, then the plane's shadow is too small,and it moves too fast.Hint: The shadow is on you only when you see the plane fly across the sun.It's much easier to see the shadow when you're in the plane.
We cannot see the shadow of an airplane flying high in the sky because the altitude is too great for the shadow to be cast clearly on the ground. The sunlight is typically too diffuse at that height, and the shadow is often too small and faint to be noticeable. Additionally, the ground beneath the airplane is vast and uneven, making it difficult for the shadow to appear distinct. Lastly, atmospheric conditions and obstacles on the ground can further obscure any potential shadow.