a) image attachedb) image attached If the tungsten filament of a light bulb israted at 78 W, what is the surface area of thefilament? (Assume that the main energy lossis due to radiation.)Answer in units of mm². Use Stefan's law to calculate the to-tal power radiated per unit area by atungsten filament at2090 K. The Stephan-Boltzmann constantis 5.6696 x 10-8 w/m2 /Kt. Assume the fila-a temperature ofment is an ideal radiator.Answer in units of W/m2.

Temperature (T) of tungsten filament= 2090 kStephan boltzmann constant (σ) = 5.6696×10-8 Wm2-k4Power…

Use Stefan's law to calculate the to- tal power radiated per unit area by a tungsten filament at 2090 K. The Stephan-Boltzmann constant is 5.6696 × 10¬8 W/m²/K*. AsSsume the fila- a temperature of ment is an ideal radiator. 2 Answer in units of W/m².

Use Stefan's law to calculate the to- tal power radiated per unit area by a tungsten filament at 2090 K. The Stephan-Boltzmann constant is 5.6696 × 10¬8 W/m²/K*. AsSsume the fila- a temperature of ment is an ideal radiator. 2 Answer in units of W/m².

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter28: Quantum Physics

Section: Chapter Questions

Problem 6P

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Concept explainers

Applications Of Reflection Of Light

When a light ray (termed as the incident ray) hits a surface and bounces back (forms a reflected ray), the process of reflection of light has taken place.

Sign Convention for Mirrors

A mirror is made of glass that is coated with a metal amalgam on one side due to which the light ray incident on the surface undergoes reflection and not refraction.

Question

a) image attached

b) image attached

If the tungsten filament of a light bulb is
rated at 78 W, what is the surface area of the
filament? (Assume that the main energy loss
is due to radiation.)
Answer in units of mm².

Use Stefan's law to calculate the to-
tal power radiated per unit area by a
tungsten filament at
2090 K. The Stephan-Boltzmann constant
is 5.6696 x 10-8 w/m2 /Kt. Assume the fila-
a temperature of
ment is an ideal radiator.
Answer in units of W/m2.

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