One-meter ruler and tape measure for experimental equipment

Test method 1. When the sun shines, erect a one-meter ruler beside the flagpole.

2. Measure the shadow length of the flagpole with a tape measure and record it as x 1.

3. Measure the shadow length of one meter ruler with a tape measure as x2.

4, the calculation assumes that the flagpole height is x3, then

x3/x 1= 1/x2

So you can get the height of the flagpole.