
Concept explainers
How the statementis affected by diffraction.

Answer to Problem 3Q
Solution:
The diffraction will result in blurred and less sharp image.
Explanation of Solution
When the stopping down of the lens is too much, which means the f-number will be big and so the iris opening is small. Light will be diffracted as it pass through this small lens opening. That is, light will begin to “bend around” the edges of the stop.
This diffraction will result in blur image, especially around the edges of the film, and will lead to less sharp image.
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