Question

What’s the wavelength for the visible region in electromagnetic radiation?

(a) 400 – 750 nm

(b) 400 – 750 mm

(c) 400 – 750 μm

(d) 400 – 750 pm

I have been asked this question in my homework.

Question is from Developments Leading to the Bohr’s Model of Atom topic in division Structure of Atom of Chemistry – Class 11

Answer 1

Right choice is (a) 400 – 750 nm

To elaborate: Electromagnetic spectrum is made up of various electromagnetic radiation. They are radio waves, X-rays, gamma rays, UV rays, the visible region, IR waves, and microwaves. Visible rays are the only ones which a human eye can see. They range from 450 – 750 nm.