What made Niels Henrik David Bohr famous? and how did their work change the world?

Question

are you inspired with this scientist? why?

Answer 1

Bohr was perhaps the greatest scientist of Denmark.  We might call him a Great Dane.

He developed what we call the Bohr model of the atom.  It was the first explanation that provided a satisfactory (more or less) explanation of the why the lines of the hydrogen spectrum had the wavelengths that they did.

It incorporated quantum theory and paved the way to our understanding of the modern quantum mechanical atom.