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Which of the following is the setup to make a basic pinhole camera?
A An enclosed box with a small hole on one of its surface
B An enclosed box with a small plane mirror on one of its surface
C An enclosed box with a small concave mirror on one of its surface
D An enclosed box with a small convex mirror on one of its surface

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Last updated date: 21st Apr 2024
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Answer
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Hint: We know that if light passes through a tiny hole, or pinhole, all the unfocused rays of light are blocked leaving the focused light to reach the retina undisturbed. The focused light rays help bring images and objects into clear focus. This is the pinhole effect. Light passes through both pinhole cameras and human eyes to project an upside-down image. In a pinhole camera, light passes through the pinhole to project an upside-down image onto the back of the box, and in the human eye, light passes through the lens to project an upside-down image on the back of the retina.

Complete step by step answer
We know that a pinhole camera is a simple camera without a lens but with a tiny aperture (the so-called pinhole) – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect. A pinhole camera is a simple camera, without lens, in the shape of a box. One of the sides has a small hole and it produces an inverted image of the outside world on the other side. The image of the outer object is created inverted on the inner box translucent screen.
The pinhole camera works on the principle that light travels in a straight line that is rectilinear propagation of light. A common use of pinhole photography is to capture the movement of the sun over a long period of time. This type of photography is called solargraphy. Pinhole photography is used for artistic reasons, but also for educational purposes to let pupils learn about, and experiment with, the basics of photography.
A pinhole camera is a simple camera without a lens but with a tiny aperture, a pinhole - effectively a light-proof box with a small hole in one side.

So, the correct answer is option A.

Note: We know that an inverted image is formed in a pinhole camera because the light rays coming from the top and bottom of the object intersect at the pinhole. Thus, we get an upside-down image in a pinhole camera due to linear propagation of light through the hole of the pinhole camera. One of the main advantages of a pinhole camera is its size. Because these cameras do not require a lens, they are able to come in a wide range of sizes, including small and discreet. Pinhole cameras can therefore be disguised as a variety of other objects, such as pens, headphones, or even glasses frames.