Amount of light entering into the camera depe | vedclass

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(D) The amount of light entering a camera is determined by the size of the aperture. An aperture is the opening through which light enters the camera.

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Aperture setting of the camera

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(D) The amount of light entering a camera is determined by the size of the aperture. An aperture is the opening through which light enters the camera. If $N$ is the $f$-number,$f$ is the focal length,and $D$ is the diameter of the aperture,then the amount of light entering the camera is proportional to the area of the aperture. The area is given by $	ext{Area} = \frac{\pi D^{2}}{4} = \pi \left( \frac{f}{2N} ight)^{2}$. Since the area depends on the aperture diameter $D$ (which is controlled by the aperture setting),the correct option is $D$.

Amount of light entering into the camera depends upon

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