2006-09-16 06:16:59 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Physics
They do. It depends on the size of the bird, but I have seen the shadow of an eagle flying over.
2006-09-16 07:53:05 · answer #1 · answered by science teacher 7 · 0⤊ 0⤋
The answer is...it does, but you need to be close enough and quick enough to catch sight of it as it whizzes by.
For all intents and purposes, sun rays arrive at Earth as parallel rays. That is, contrary to some answers, there is essentially no point source effect at all.
Thus, the shadow of a bird, airplane, Superman, or UFO will have the same size and shape as projected onto the ground in two dimensions that the three-dimensional object has in the air. Thus, the shadow of a 747 will be way bigger than that of a humming bird for example.
2006-09-16 06:59:31 · answer #2 · answered by oldprof 7 · 0⤊ 0⤋
If the chicken grow to be 'flying' in a perfect vacuum it might solid a greater distinctive shadow (via fact solar rays are almost parallel) however the ambience can diffuse the gentle (the same way that stars are led to to twinkle). additionally sunbeams accomplishing the chicken from opposite edges of the solar's width at the instant are not rather parallel and the sides of any shadow should not be completely distinctive. The shadow has an umbra (finished) and a penumbra (almost finished as a peninsular is almost an island, and so on.). possibly a extensive chicken (hawk or eagle, and so on.) can see its very own shadow from a brilliant top at the same time as a small chicken's shadow is purely too subtle.
2016-12-18 11:22:10 · answer #3 · answered by ? 4 · 0⤊ 0⤋
Because the sun is not a point source of light. Cast a shadow on the ground with your hand, holding it a few feet up. You will see that the shadow does not have a sharp edge; at any given point on the shadow, your hand will block only part of the sun's light. The higher you hold your hand, the fuzzier the outline is. If you stand on a ladder 40 feet above the ground, there is no part of the shadow which is completely dark.
2006-09-16 06:22:18 · answer #4 · answered by Anonymous · 1⤊ 1⤋
it does, but birds are small and if they are high, very high the light form the sun will drown out the Shadow. but if it passes directly in front of the sun it should cast a shadow for a second, like planes do
2006-09-16 06:20:33 · answer #5 · answered by flinch387 2 · 1⤊ 0⤋
a bird really high up will leave a shadow just like an airplane, its just not directly beneath it. and often times the shadow is rather small as well making it more dificult to locate.
2006-09-16 06:27:28 · answer #6 · answered by Craig M 3 · 0⤊ 0⤋
Have you noticed that shadows get blurrier the further the object is from the ground? Eventually the shadow is all blur.
2006-09-16 06:23:40 · answer #7 · answered by Anonymous · 0⤊ 0⤋
because far of objects have shadow but it is comparatively small so we cannot notice it. as an object moves far so its shadow starts decreasing so it is not visible to human eye
2006-09-16 06:33:12 · answer #8 · answered by Anonymous · 0⤊ 0⤋
It does. It is only hard to locate it, because it is not directly underneath it, depending on the angle of the sun.
2006-09-16 06:19:28 · answer #9 · answered by cpinatsi 7 · 0⤊ 0⤋
They are to small and to far up.
2006-09-16 06:20:45 · answer #10 · answered by dancer 2 · 0⤊ 1⤋