On a daily basis, Noon, or the solar equivalent of mid-day.
On an annual basis it would depend on where you are.
Since the earth tilts to a maximum of 23.44°, then if one above the latitude 23.44°, or below the latitude -23.44°, then it would be shortest at noon on the summer solstice (June in the northern hemisphere, December in the Southern Hemisphere).
Between the latitudes -23.44° and 23.44°, there would be 2 days a year where the sun is directly overhead.
the shadow of the sundial is just called a shadow
The raised arm of a sundial that indicates the time of day by its shadow is the gnomon (NO-mon). A sundial has but one arm, what do you mean by secondary arm?
A sundial is no good unless the sun is shining, and a shadow is cast.
The pin of a sundial where the shadow falls is called the gnomon. It is typically a thin, straight rod that extends vertically from the sundial's base. The shadow cast by the gnomon is used to indicate the time of day on the sundial's face.
The pointer on a sundial is called a gnomon. It casts a shadow on the sundial face to indicate the time.
The shortest shadow on a sundial would be afternoon or Middaay
the shadow of the sundial is just called a shadow
The raised arm of a sundial that indicates the time of day by its shadow is the gnomon (NO-mon). A sundial has but one arm, what do you mean by secondary arm?
A sundial is no good unless the sun is shining, and a shadow is cast.
A sundial is no good unless the sun is shining, and a shadow is cast.
You can use a sundial, which is a device that uses the position of the sun's shadow to tell time. By placing a stick or pointer on the sundial, the shadow it casts can indicate the time based on markings on the sundial's face.
The pin of a sundial where the shadow falls is called the gnomon. It is typically a thin, straight rod that extends vertically from the sundial's base. The shadow cast by the gnomon is used to indicate the time of day on the sundial's face.
The pointer on a sundial is called a gnomon. It casts a shadow on the sundial face to indicate the time.
The raised arm of a sundial that indicates the time of day by its shadow is the gnomon (NO-mon). A sundial has but one arm, what do you mean by secondary arm?
A shadow clock, or sundial, tells the time of day using the position of the Sun. The sun casts a shadow from the sundial's style onto a marked surface of hours.
Position of a Shadow
whaere is the answer