is that true that we dont have shadow at 12 noon may be for a second through out the year?

Answer 1

NO. Since I live in the northern hemisphere, The sun is never directly overhead, rather to the south. So my shadow falls to the north of me at 12 noon.
If I were on the equator the sun would be directly overhead at noon, and my shadow would be beneath me.

Answer 2

Shadow At 12 Noon

Answer 3

The question becomes: is it true that the Sun can be directly overhead (not almost overhead -- exactly overhead)?

The Sun's declination goes from 23.4393 degrees North (June solstice) to 23.4393 degrees South (December solstice).

If you live on Earth, between latitudes 23.4393 N and 23.4393 South, then it is possible.

For each latitude between these values, there will be two days in the year where the sun will be exactly overhead when it crosses your local meridian.

The regions where this is possible is called the "tropics" and the limits are marked by the latitudes called the Tropics (Tropic of Cancer, Tropic of Capricorn). You see then as dashed lines on globes and maps.

If you live exactly on such a line, then there is only one day a year.

For example, if you are exactly on the equator (latitude = 0), then the two dates correspond to the days of equinox. In 2007: Spring equinox = March 20 in North America, March 21 in Asia; Fall equinox = Sept. 23. Spring equinox happens everywhere at the same time, but because of time zones, the date is not the same everywhere on the planet.

If you live at some other latitude, you need to look up the dates when the sun's declination is the same as your latitude.

If you live outside the tropics, then the Sun can never be directly over your house.

Mind you, even at the "magic second" in the tropics, you still cast a shadow. It is just that your shadow is directly underneath you and does not "stretch" out in any direction.

In theory, this is an instantaneous event. In practice, the apparent movement of the Sun is slow enough that you could "enjoy" the event over a few minutes.

Answer 4

sometimes i get my 12 O Clock shadow at 4 O Clock so it becomes 4 O Clock shadow, but we have a shadow no matter where we go, just because it's 12 noon and the sun is shining down on you it doesn't mean your arms or legs don't make a shadow beneath you when you walk.

Answer 5

No, that is not true. Even if the Sun is directly overhead, you still have a shadow. It may be directly below you and be small and not easily noticed, but you still have one. To cast a bigger shadow you only have to lean over a bit or hold your arms or something.

Answer 6

You have receiving area (ground) object (you) light source (sun)

given those three items you will always have a shadow. Angle of light overhead will judge the length of shadow