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The function and formation of images in the optical instruments are easily understandable with the help of _______ diagrams.

A _______ is an optical instrument that forms and records an image of an object.

In a digital camera, the electronic sensor stores the image _______.

The lens used in a camera is a _______ lens.

When taking a photograph in bright light a _______ f-number (narrow aperture) must be used.

When taking a photograph in bright light a _______ aperture must be used.

When taking a photograph in dim light a _______ f-number must be used.

When taking a photograph in dim light a _______ aperture must be used.

The _______ controls the time during which light enters the camera through the lens.

The shutter speed is expressed in terms of the _______ time.