Will Xbox One Games Play on Xbox 360?

No. Xbox One games are completely incompatible with Xbox 360.

Why

• Architecture: Xbox 360 uses a PowerPC tri-core CPU (Xenon). Xbox One uses x86-64 AMD Jaguar. Instruction sets are mutually unintelligible
• OS: 360 runs a custom Windows-derived kernel. One runs a hypervisor hosting Windows 10-based ERA + Game OS. APIs (DirectX, XAudio, etc.) are generations apart
• Media: Both use Blu-ray, but file systems, encryption, and DRM schemes differ

Direction of Compatibility

Backward Compatibility flows forward: Xbox One / Series X|S can play select Xbox 360 (and original Xbox) titles via software emulation. The reverse is technically impossible.

If you own both consoles, buy the Xbox One version for the newer hardware, or the 360 version if you only have a 360.