why don't u Google it...it's that simple

Not always the case. It depends on the intensity of the light source.

Yberehab mench tela ylewem

Kemech jemro new light tla minorew😂😂

እሳት ብርሃን ነው ብርሀን ደሞ የጥላ ተቃራኒ ነው ጥላ ሊኖረው አይችልም ምክነያቱም ሚዳሰስ ቁስ አካል አደለም ብርሃን ያሳልፋል ያደሞ ጥላን ለመፍጠር አያስችለውም

As much as I know light doesn't cast a shadow cuz it is not an opaque material ( those which cast a sharp shadow) that why u saw the shadow of the stick not the light.

Koy sewu amotalde yheko kelal neger new. Kewedh kejerbaw lela brhan ale ya new tla yefeterew! Enji beftsym brhan tla yelewm

በብርሃን ውስጥ ብርሃን ስለሚያልፍ

It's the source of the light it self