spectroscopy - A compound that absorbs all visible light

Is there a compound that absorbs all visible light?

What is a Spectrophotometer

Compound Interest: Analytical Chemistry – Infrared (IR) Spectroscopy

Absorbance Spectroscopy, Absorbance Explained

Colour me chemical › Science Features (ABC Science)

Introduction to Photosynthesis

Spectroscope, Definition, Diagram & Parts - Lesson

Types of Spectra: Continuous, Emission, and Absorption

The Chemistry of Light & Color

Chemical compound - Spectroscopy, Organic, Analysis