Question

assuming that a 10m high structure is observed from a distance of 20m.what is the size of image in pin hole camera? assuming that the distance between the lens and imaging plane is 17mm

Answer 1

Answer:

The size or height of the image in pin hole camera is 8.5 mm.

Step-by-step explanation:

Given data:

Height of the structure, h₁ = 10 m

Distance of the structure from the camera lens, d₁ = 20 m

Distance between the lens and the imaging plane, d₂ = 17 mm = 17/1000 m = 0.017 m

To find: size or height of the image, h₂.

We know,  

(Distance of the object)/(distance of the image) = (Height of the object)/(height of the image)

∴d₁ / d₂ = h₁ / h₂

or, h₂ = (h₁ * d₂) / d₁

or, h₂= (10 * 0.017) / 20

or, h₂ = 0.017 / 2 = 0.0085 m  

or, h₂ = (0.0085 * 1000) mm = 8.5 mm