der Abstrahlwinkel
Translation
beam angle, angle of radiation, emission angle
Examples
Die Lampe hat einen weiten Abstrahlwinkel.
The lamp has a wide beam angle.
Grammar Patterns
the beam angle is ... degrees. Der Abstrahlwinkel beträgt 90 Grad.
Similar Words
Sendewinkel (transmission angle), Lichtkegel (cone of light)
Etymology
Composed of 'ab-' (away), 'strahlen' (to radiate), and 'Winkel' (angle). Literally 'angle of radiating away'.
Memory Tips
Think of a spotlight: the 'Winkel' (angle) at which its light 'strahlt ab' (shines away) is its 'Abstrahlwinkel'.