At "local apparent noon", when the Sun is highest in the sky. This will be noon on your watch only if you are at the middle meridian in your time zone and if you are not on daylight savings time.
Shadows are shortest at noon when the sun is directly overhead, creating a smaller angle between the sunlight and the object casting the shadow. As the angle increases in the morning and afternoon, shadows lengthen.
Summer
summer shadows are shortest and winter shadows are long.
local noon (not noon according to the clock)
At "local apparent noon", when the Sun is highest in the sky. This will be noon on your watch only if you are at the middle meridian in your time zone and if you are not on daylight savings time.
The day when your shadow is the shortest depends on where you are on the Earth. * In the northern hemisphere it is when the sun is the highest in the sky. The day of the Summer Solstice * .In the southern hemisphere it is when the sun is the highest in the sky. The day of the Winter Solstice. * At the equator the sun is directly overhead and your shadow is at its minimum at each of the equinoxes
Shadows caused by the sun are shortest at midday and longest just after sunrise and just before sunset.
When the shadows are short, the sun is typically somewhere overhead.
You would expect to find the shortest shadows around noon when the sun is at its highest point in the sky. This is because the angle of the sun's rays are more directly overhead, resulting in shorter shadows.
Your shadow would be shortest at noon because the sun would be directly overhead.
The month with the shortest shadows is typically around noon on the summer solstice, which occurs in late June. This is when the sun is at its highest point in the sky, creating shorter shadows compared to other times of the year.
shadow will become short when it was xiawu and no shadow at night! haha At noon, when the sun aerial, and shadows is the shortest. When the sun goes down, the shadows change into the longest.