(a) Interpretation: The wavelength of maximum emission of a tungsten filament bulb at 2870 K and 3750 K needs to be calculated. Introduction: The Wein’s displacement Law states that the maximum wavelength in micrometers for the radiations of the blackbody is represented as follows: Λ m a x T = 2.90 × 10 3 Here, T is defined as the temperature in Kelvin as it is absolute temperature. Stefan’s law states that the total quantity of heat energy released per second per unit area by a perfect blackbody is directly proportional/related to the fourth power of the absolute temperature of its surface given by the equation: E t = aT 4 Where a has a value of 5.69 × 10 − 8 Wm -2 K -4

BuyFind

Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213
BuyFind

Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213

Solutions

Chapter 7, Problem 7.5QAP
Interpretation Introduction

(a)

Interpretation:

The wavelength of maximum emission of a tungsten filament bulb at 2870 K and 3750 K needs to be calculated.

Introduction:

The Wein’s displacement Law states that the maximum wavelength in micrometers for the radiations of the blackbody is represented as follows:

ΛmaxT = 2.90×103

Here, T is defined as the temperature in Kelvin as it is absolute temperature.

Stefan’s law states that the total quantity of heat energy released per second per unit area by a perfect blackbody is directly proportional/related to the fourth power of the absolute temperature of its surface given by the equation:

Et = aT4

Where a has a value of 5.69×108 Wm-2K-4

Interpretation Introduction

(b)

Interpretation:

The total energy output of the bulb in terms of W/m3 needs to be determined.

Concept introduction:

The Wein’s displacement Law states that the maximum wavelength in micrometers for the radiations of the blackbody is represented as follows:

ΛmaxT = 2.90×103

Here, T is defined as the temperature in Kelvin as it is absolute temperature.

Stefan’s law states that the total quantity of heat energy released per second per unit area by a perfect black body is directly proportional/related to the fourth power of the absolute temperature of its surface given by the equation:

Et = aT4

Where a has a value of 5.69×108 Wm-2K-4

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