What is a pure spectrum?

What do you mean by impure and pure spectrum?

What are broad spectrum antibiotics.

What are broad spectrum antibiotics ? Give one example.

What.is'H - spectrum? How it can be explained by Bohr's Theory.

Chloramphenicol is a narrow spectrum antibiotic

What is H-spectrum ?

What is the electromagnetic spectrum?

What is the nature of spectrum of moonlight?

The first member of Balmer series in hydrogen spectrum has a wavelength of 6563overset@A .What will be the wavelength of Lyman series in the same spectrum ?