The document presents measurements taken using a gnomon, detailing its height of 100 cm and shadow lengths across various months. It also includes data on sun angles, time of measurements, sunrise and sunset times, and the corresponding lengths of day. This data illustrates the relationship between the sun's position and the length of shadows throughout the year.

1. Our gnomon
The gnomon measures 100 cm.
The protractor is aligned with the
north direction (given by a compass )
h
Our measures and calculations
jan feb mar apr may jun jul aug
Gnomon height 1 1 1 1 1 1 1 1
Shadow length (m) 2,61 1,73 1,15 0,75 0,55 0,47 0,53 0,7
tan h 0,38 0,58 0,87 1,33 1,8 2,14 1,88 1,43
Sun angle (deg) 21 30 41 53 61 65 62 55
Time 14:02 14:00 13:58 13:46 13:44 13:49 13:49 13:50
Sunrise 08:20 07:40 06:49 06:51 06:10 05:57 06:18 06:54
Sunset 17:37 18:22 19:01 20:41 21:19 21:41 21:21 20:46
day length: 09:17 10:42 12:12 13:50 15:09 15:44 15:03 13:52
Sun angle(deg) Shadow length (m)
70 3
60
2,5
50
2
40
30 1,5
20 1
10 0,5
0
0
jan
y
jul
r
ma
ma
n
l
ay
ar
ju
ja
m
m