Discussion
The image formed by a pinhole camera is real. Which of the following statements offers a suitable explanation for this fact ?
Answer: B
The suitable explanation is that light travels in a straight line.
Light from each point of the object passes in a straight line through the tiny pinhole and falls on a single point of the screen. Rays from the top of the object reach the bottom of the screen and rays from the bottom reach the top, so a real, inverted image forms on the screen.
Diffraction at the small hole would only blur the image, not create it. That light is a form of energy is true but explains nothing about image formation, and refraction (bending when passing into another medium) plays no part in a pinhole camera.
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