How can we measure time measuring the length of the shadow?

Answer 1

not the length of the shadow but the direction of the shadow. The shadow is determined by the position of the sun in the sky, which could indicate the time, i guess. A stick in the ground could act as a sun dial. You can mark the line of the shadow on the ground and also write what the time was at that point. Do this at hourly intervals, I'm not sure if it will work, but yeah.

Answer 2

Time and length are two separate fundamental quantities so in no way we can measure length with time.

But if length of the shadow is a function of time then we can measure it by knowing its rate of increase or decrease.

Measuring Length:
L = (t) (∆L/∆t) Eq. 1

Measuring time:
t = (L) (∆t/∆L) Eq. 2

L= length of the shadow at any time in Eq.1
L= initial length of the shadow at a particular time in Eq.2
t = time
(∆L/∆t) = Time Rate of increase or decrease
(∆t/∆L) = Space Rate of increase or decrease

Answer 3

If you know exactly where south is (if you're in the northern hemisphere) or north (if you're in the southern one), then you can see when noon is. If you keep track until the next time its noon you'll know when 24 hours have passed.
Thats just one easy example, but there are other ways if you know your exact position on the earth and the date.

Answer 4

The two answers--first and third----are adequate answers.There is hardly any scope to improve on either.

Answer 5

y wud u man?..just use a watch...this is yr 2007!!!