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Chapter 3, Problem 3.29QP

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CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933

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Chapter
Section
FindFindarrow_forward

CHEMISTRY: ATOMS FIRST VOL 1 W/CON...

14th Edition
Burdge
ISBN: 9781259327933
Interpretation Introduction

Interpretation:

The difference in energy (in joules) between a photon with λ = 680 nm (red) and a photon with λ = 442 nm (blue) should be calculated.

Concept Introduction:

A wave is a disturbance or variation that travels through a medium transporting energy without transporting matter. The wavelength is defined as the distance between the two similar points on consecutive waves.  The frequency is defined as the number of waves which move through any particular point in one second.

images

Figure.1

The speed, wavelength and frequency of a wave are interrelated by = λν where λ and ν are mentioned in meters (m) and reciprocal seconds (s1).

Planck’s quantum theory

  1. 1. Different atoms or molecules emit or absorb energy in discreet quantities only.  The smallest amount of energy which is emitted or absorbed in the form of electromagnetic radiation is called quantum.
  2. 2. The energy of the radiation absorbed or emitted is directly proportional to the frequency of the radiation.  The energy of radiation is expressed in terms of frequency as, = hν where, E = energy of the radiation; h = Planck’s constant (6.626 × 1034 Js) and ν = frequency of radiation.

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