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Calculate the height of the image formed by a pinhole camera of length 12cm used...

Physics
JAMB 2017

Calculate the height of the image formed by a pinhole camera of length 12cm used to photograph an object 60cm away from the hole and 70cm high

  • A. 10 cm
  • B. 16 cm
  • C. 5 cm
  • D. 14 cm
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Correct Answer: Option D
Explanation

Magnification = \(\frac{\text{Length of camera}}{\text{distance of object from pin hole}}\)

m = \(\frac{12}{60}\)

= 0.2

Also magnification m = \(\frac{\text{Height of image}}{\text{Height of object}}\)

∴ Height of image = m × height of object

= 0.2 × 70

= 14cm

There is an explanation video available below.


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Explanation Video

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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
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