English Dictionary

Arago spot

noun

(optics) A bright point that appears at the centre of a circular object's shadow due to Fresnel diffraction.

I visited the famous Arago spot during my vacation.

意味（1）

(optics) A bright point that appears at the centre of a circular object's shadow due to Fresnel diffraction.

The Arago spot played an important role in the discovery of the wave nature of light and is a common way to demonstrate that light behaves as a wave.