Chapter 5.1, Problem 5.5QAP

Interpretation Introduction

Interpretation:

To determine the radiation with higher frequency and higher energy from the given information:

UV radiation with wavelength 3 × 10-7 m and infrared radiation with wavelength 1 × 10-⁵m

Concept introduction:

Wavelength: It may be defined as the distance between two successive crest of a wave. Unit of wavelength is nm.

Frequency:

It may be defined as the number of waves that passes through a fixed point in a unit time. Unit of frequency is Hz or s-¹.

Relation between Energy and wavelength and frequency. Mathematically,

  $\begin{array}{l}\text{E}\text{=}\frac{\text{hc}}{\text{λ}}\text{=hυ}\\ \text{where,}\\ \text{E}\text{=}\text{energy}\\ \text{h}\text{=}\text{plancks}\text{constant}\\ \text{c}\text{=}\text{speed}\text{of}\text{light}\\ \text{λ}\text{=}\text{wavelength}\\ \text{υ}\text{=}\text{frequency}\end{array}$