What color do we see when all visible light is absorbed?

We will see black color when all visible light is absorbed. A color which an object does not absorb gets reflected by the object. You can read about LIGO India – Gravitational Wave Detector in India in the given link.

Further readings:

1. Topic-Wise GS 3 Questions for UPSC Mains
2. Science & Technology Notes For UPSC – General Science Notes