spotlight / emitter
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spotlight
A lamp that emits a strong, focused beam of light in a specific direction. It is used to illuminate stages, buildings, or work areas.
Der Strahler beleuchtete die Fassade des alten Rathauses.
The spotlight illuminated the facade of the old town hall.
'Strahler' (spotlight/emitter) is derived from the verb 'strahlen' (to shine/radiate). The ending '-er' forms a noun that can refer either to a device, such as a lamp that shines, or to a person, such as someone who searches for sparkling crystals.
Die Sonne strahlt heute vom blauen Himmel.
The sun is shining from the blue sky today.
You can recognize the meaning from context: if it is about light and illumination, it means a lamp. If it is about mountains and minerals, it means a person. In the context of physics or technology, it means an object that emits radiation.
Wir brauchen einen stärkeren Strahler für die Baustelle.
We need a stronger spotlight for the construction site.
In connection with lighting, 'Strahler' (spotlight) is often combined with the type of lamp, for example 'LED-Strahler' (LED spotlight) or 'Halogen-Strahler' (halogen spotlight). Typical verbs are 'einen Strahler installieren' (to install a spotlight), 'ausrichten' (to align), or 'einschalten' (to switch on).
Der Elektriker hat gestern die neuen LED-Strahler im Garten installiert.
The electrician installed the new LED spotlights in the garden yesterday.
As an object that emits radiation, 'Strahler' (emitter) is a technical term from physics and engineering. The type of radiation is often specified, for example 'Wärmestrahler' (heat lamp/radiant heater), 'Infrarotstrahler' (infrared emitter), or 'Alphastrahler' (alpha emitter).
Über dem Wickeltisch hängt ein Wärmestrahler, damit das Baby nicht friert.
A heat lamp hangs above the changing table so the baby does not get cold.
station / sender
'der Sender' and 'der Strahler' can both emit something. 'Sender' is usually about signals, for example radio or other technical signals. 'Strahler' is used more for light, heat, or other radiation; in everyday language, it often means a strong lamp. The words can be confused because both give off some kind of energy or signal. As a practical rule: for radio, wireless communication, and messages, 'Sender' fits. For light on a stage, heat, or physical radiation, 'Strahler' fits.
Auf der Baustelle leuchtet ein heller Strahler den Eingang aus.
On the construction site, a bright spotlight lights up the entrance.
Im Labor misst Mehmet, wie stark der kleine Sender das Funksignal ausgibt.
In the lab, Mehmet measures how strongly the small transmitter emits the radio signal.