Medium in which velocity of light remains constant is?

میڈیم جس میں روشنی کی رفتار مستقل رہتی ہے؟

Plane medium

Homogeneous

Heterogeneous

None of these

The velocity of light remains constant in a homogeneous medium, where the material properties (such as refractive index) are uniform throughout.

In a heterogeneous medium, variations in composition cause light to change speed and direction.