physical optics

noun plural but usually singular in construction

: a branch of optics that deals with the description and explanation of all optical phenomena in terms of physical theories (as undulatory theory, electromagnetic phenomena, or quantum mechanics)

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now