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By means of trigonometry if you know the angle of elevation or by comparing it with a nearby object if you know its height and shadow length.
longest
Because of the position of the Sun during different times of the day
It is zero: 0cm; 0mm A shadow has no height: length yes, but height no
Light leaves the lamp and travels in straight lines from its point source. As you move away from the source, the angle between you and the light changes and this the length and position of your shadow changes.
The position of the sun relates to the length of the shadow cast by an object because, when the sun is above the object there is no shadow yet, when the sun is say to the east of the object a shadow is cast towards the west, the farther the sun for example east the longer the shadow will be towards the west.
The shadow is in front of you when the sun is behind you, typically in the late morning or early afternoon. The length and direction of the shadow will vary depending on the position of the sun in the sky.
i think yes as try it yourself
The length of an object's shadow is determined by ... -- the length of the object, -- the angle between the object's length and the surface on which its shadow appears, -- the distance between the object and the surface on which its shadow appears, -- the angular size of the light source as seen from the object, -- the angle between the direction to the light source and the normal to the object.
Because he absorbs or reflects light like any other solid object. Yes that and the fact that everyone and everything will have and always has had a shadow.
Sundial is the term
The relationship between the size of a shadow of an object and the distance of light source from the object is indirectly proportional. A short distance will make the shadow big while making the distance long will reduce the size of the shadow.
The shadow of a solid object is cast by the Sun on the ground. As the Sun appears to cross the sky between dawn and dusk, so the length of the shadow also changes, both in direction and in length on the ground.Put a wooden post a metre high in open ground on a sunny day. Use a watch, and every hour place a small rock where the end of the post's shadow is on the ground. Eventually, you will see by the position of the rocks, just how the shadow of the post changes during the day.
Because the length of your shadow, is dependent on the position of the sun. The higher the sun is in the sky, the shorter your shadow is. When the sun is low on the horizon in early morning or late evening, you present a larger 'image' and therefore your shadow is bigger.
If the direction from which the light comes changes, then the direction of the shadow changes as well. The shadow basically points away from the light source.
Usually somewhere towards the west. However, the exact length and direction of the shadow depend on your exact geographical position (both latitude and longitude), and on the time of year.