Intensity. They relate the intensity of a pressure wave to a normal or standard pressure
Forces always work in the direction of their application.
Eg- Gravitational forces acts downwards due to the earth's pull.
Answer:
= 2.83
Explanation:
F number (N) is given by the formula;
F- number = f/D
where f = focal length of lens and D = diameter of the aperture
Therefore;
F number = 17 cm/6 cm
<u> = 2.83</u>
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