4) A light source of 1000 cd is situated 3 m above a workingsurface.•Calculate the illuminance directly below the source. El600%3D•What would be the illuminance if the lamp were moved toa position 4 m from the surface?I006 3) A 150 W sodium-vapour street lamp emits a light of 1000 cdand is situated 4 m above the road. Calculate the illuminance (a)\directly below the lamp and (b) at a horizontal distance along|the road of 7 m.31Prepared by: ASAN BANU

As per guideline i have to answer only one

4) A light source of 1000 cd is situated 3 m above a working surface. •Calculate the illuminance directly below the source. E le00 %3D •What would be the illuminance if the lamp were moved to a position 4 m from the surface? I006

4) A light source of 1000 cd is situated 3 m above a working surface. •Calculate the illuminance directly below the source. E le00 %3D •What would be the illuminance if the lamp were moved to a position 4 m from the surface? I006

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Question

4) A light source of 1000 cd is situated 3 m above a working
surface.
•Calculate the illuminance directly below the source. E
l600
%3D
•What would be the illuminance if the lamp were moved to
a position 4 m from the surface?
I006

3) A 150 W sodium-vapour street lamp emits a light of 1000 cd
and is situated 4 m above the road. Calculate the illuminance (a)\
directly below the lamp and (b) at a horizontal distance along|
the road of 7 m.
31
Prepared by: ASAN BANU

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