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When two mirrors are placed at an angle of 90º to each other, how many images...

Physics
JAMB 2017

When two mirrors are placed at an angle of 90º to each other, how many images will be formed when an object is placed in front of the mirrors

  • A. 5
  • B. 4
  • C. 3
  • D. 2
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Correct Answer: Option C
Explanation

When two mirror are inclined at an angle θ, the number of images formed, n = \(\frac{360}{\theta}\) − 1

∴ since \(\theta\) = 90o

∴ \(\frac{360}{\theta}\) − 1

= 4 − 1

= 3

There is an explanation video available below.


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Explanation Video

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free