Why do we not see the shadow of airplanes and birds flying in the sky?

When the bird is flying high in the sky the distance between the body and the surface of the Earth is too large and hence even though the light is obstructed by the bird’s body it cannot cast its shadow due to the large distance. Hence, birds flying high in the sky do not cast shadow.

How do birds affect airplanes?

Most of the modern engines are required to be capable of ingesting birds that weigh about 1.8-kilo while running at full power. This means that even if both the engines are hit by large birds, it can provide a combined thrust output of at least one engine which is more than enough to return to the airport.

What will happen to the shadow if the distance between the object and the screen is decreased?

-If we decrease the distance between the source of light and the object, then the size of the shadow will increase because the amount of light falling on the screen will decrease.

Why a flying bird appears higher in the sky compared to its actual height?

Due to the temperature gradient in the air, light ray gets refracted and bends. The ray bends make the concave sides face towards the surface of the Earth, that is, why the apparent height of the bird appears more than its actual height.

Where will the shadow of the airplane appear?

Bottom line: Shadows from jet contrails often appear to be above the contrail, seemingly cast by a low-altitude bright light shining upwards. In fact, the shadow is normally cast on clouds below the jet and its contrail since the sun (and the moon) are above.

Can we see shadow even if there is no light?

Simply speaking, a shadow is an absence of light. If light cannot get through an object, the surface on the other side of that object (for example, the ground or a wall) will have less light reaching it. A shadow is not a reflection, even though it is often the same shape as the object.