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प्रश्न
Explain the formation of the image of a luminous object in a pinhole camera with the aid of a neat diagram.
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उत्तर
When a luminous object AB, such as a lighted candle, is placed in front of the pinhole, an inverted picture A’ B’ of the candle is
obtained on the tracing paper. This picture A’ B’ is called the image. The image obtained is upside down (i. e. inverted). The reason is that the light travels in a straight-line path. Hence light from the upper point A of the candle passes through the pinhole and strikes
the tracing paper at A’. Similarly, light from the lower point B of the candle passes through the pinhole and strikes the tracing paper
(or screen) at B’. Light from all the other points between A and B, on passing through the pinhole strikes the tracing paper in between
A’ and B’. As a result, an inverted image of the candle is seen on the tracing paper Fig shows the simple ray diagram for die formation of the image.
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संबंधित प्रश्न
Write true or false of the following statement.
The image in a pinhole camera gets blurred if the hole is made bigger.
Select the correct alternative.
The formation of inverted image in a pinhole camera shows that
How can you obtain a point source of light?
Define the terms: a ray of light and a beam of light.
State two factors that affect the size of the image formed in a pinhole camera.
How is the image affected in a pinhole camera when another fine hole is made near the first pinhole?
State the effect on the image in a pinhole camera if the hole is made bigger.
Tick the correct answer.
The image formed in a pinhole camera is
Fill in the blank
Pinhole camera is based on the ................... propagation of light.
______ camera is a simple device that helps us to understand the rectilinear propagation of light.
