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PHYSICS

JAMB 2008 - Question 31

Physics 2008 JAMB Past Questions - Question 31: An object of height 4cm is placed in front of a cubiod pinhole camera of size 6cm .if the image formed is 2cm high ,how far is the object from the pinhole ?

Choose the correct answers from the options given.

An object of height 4cm is placed in front of a cubiod pinhole camera of size 6cm .if the image formed is 2cm high ,how far is the object from the pinhole ?

A: 3.0cm

B: 8.0cm

C: 12.0cm

D: 16.0cm

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Correct Answer

Explanation

Magnification = (image height)/object height
= (lenght camera)/object distance from pin-hole
∴(2)/4 = (6)/X
X (4 x 6)/2 = 12 cm