The change in length of shadow during the day is because of the Earth's position in respect to the sun.
Why does length of shadow changes?
The tilt of the Earth's axis affects the length of our shadows. During the summer, our location is tilted towards the Sun, so our midday shadows are very short. During the winter, our location is tilted away from the Sun, so our midday shadows are longer
Why does length of shadow changes during a day?
The Sun's position in the sky affects the length of the shadow. When the Sun is low on the horizon, the shadows are long which happen during the time of sunrise and sunset. During the time of afternoon, when the Sun is high in the sky, the shadows are much shorter.
As mentioned in the picture, the shadow of object is higher in the morning and shorter during the noon.
To learn more about change in length of shadow, here is the link
https://brainly.in/question/23455225
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