Answer:
The length is [tex]D = 5 \ cm[/tex]
Explanation:
From the question we are told that
The length of the hand is [tex]l = 10.0 \ cm[/tex]
The angle at the hand is held is [tex]\theta = 30 ^o[/tex]
Generally resolving the length the length of the hand to it vertical component we obtain that the length of the shadow on the vertical wall is mathematically evaluated as
[tex]D = l * sin(\theta )[/tex]
substituting values
[tex]D = 10 * sin (30)[/tex]
[tex]D = 5 \ cm[/tex]
