Chapter 6, Problem 48GQ

Interpretation Introduction

Interpretation: The region where Lyman series and Balmer series lies in the electromagnetic spectrum has to be identified.

Concept introduction:

• Electronic transitions that take place in excited $\text{H}$ atom is,

1. i. Lyman series: electronic transitions take place to the $\text{n}\text{=}\text{1}$ level and it is in ultraviolet region.
2. ii. Balmer series: electronic transitions take place from $\text{n}\text{>}\text{2}$ to the $\text{n}\text{=}2$ level and it is in visible region.
3. iii. Ritz-Paschen series: electronic transitions take place from $\text{n}\text{>}3$ to the $\text{n}\text{=}3$ level and it is in infrared region.
4. iv. Brackett series: electronic transitions take place from $\text{n}\text{>}4$ to the $\text{n}\text{=}4$ level.
5. v. Pfund series: electronic transitions take place from $\text{n}\text{>}5$ to the $\text{n}\text{=}5$ level

• Electromagnetic radiations are a type of energy surrounding us. They are of different types like radio waves, IR, UV, X-ray etc.
• Visible radiation lies in the wavelength of $\text{400}\text{nm}$ to $\text{700}\text{nm}$ whereas ultraviolet radiation lies in the region between $\text{100}\text{nm}$ and $\text{400}\text{nm}$