Question

how is the image formed in a pinhole camera affected when the distance of screen from the pinhole increases​

Answer 1

What happens when you increase the distance between the pinhole and the screen in a pinhole camera?

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Pinhole cameras use the principle of rectilinear propagation of light. When you place an object in front of the pinhole camera, a clear image is formed on the screen. The image formed on the pinhole camera is inverted. Since the aperture of the pinhole camera is small (a diameter close to 5mm) only one ray from each point on the object passes through the pinhole and moves on to the screen. Thus there is one-to-one correspondence between the points on the object and the points on the screen.