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Calculate the height of the image formed by a pinhole cam...

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

Correct answer is D

Magnification = Length of cameradistance of object from pin hole

m = 1260

= 0.2

Also magnification m = Height of imageHeight of object

∴ Height of image = m × height of object

= 0.2 × 70

= 14cm