Question

Write about pinhole camera construction and working...

Answer 1

Answer:

Pinhole camera works on the principle that “Light travels in straight lines"Light from the objects enters the camera through the pinhole. It goes to the screen where it forms an inverted and small image. The image has the same colour as the object. If the pinhole is small, the image will be sharp and clear.

Answer 2

$\begin{gathered}\large {\boxed{\sf{\mid{\overline {\underline {\star ANSWER ::}}}\mid}}}\end{gathered}$

Construction of a pinhole camera :

➪ Take an ordinary hollow rectangular cardboard box with a small hole in the middle of one face of the box.

➪ The size of the hole should be equal to the pinhead of a common pin.

➪ Remove the opposite face of the box and fix a wax paper in its place with the help of a thread or a rubber band.

➪ The box is blacken from inside so that any light which falls on its walls directly or indirectly is absorbed.

Working of a pinhole camera :

➪ Place a luminous object such as a burning wick (XY) of the candle in front of the pinhole, an inverted picture X’Y’ of the wick is obtained on the wax paper.

➪ This picture is called the image.

The image obtained is inverted.

➪ Such an image is formed because the light travels in a straight path. Hence, light from the upper point X of the wick passes through the pinhole and strikes the wax paper at X’.

➪ Similarly, light from the lower point Y of the wick passes through the pinhole and strikes the wax paper (or screen) at Y'.

➪ When light from all other points between X and Y passes through the pinhole they strike the wax paper in between X' and Y'. Hence, an inverted image is formed on the wax paper.

@SweetestBitter