# How do you determine the angle of sunlight?

##### 1 Answer

Jul 19, 2016

At noon, this angle is given by

#### Explanation:

Defining angle of sunlight as angle of incidence of light rays

from Sun, this angle is the angle 'a' that the sunlight-direction makes

with the vertical. When sunlight strikes right from overhead, a = 0.

At sunrise and sunset on any day, sunlight strikes horizontally. So,

this angle is

At noon ( the instant midway between sunrise and sunset), this angle

is minimum, and correspondingly, the length of your shadow is

minimum.

If you measure the length of the shadow at noon as L against your

height H,

Of course, this varies between