Question

select the correct answer. which statement about the working principle of the still camera is true? a. light entering the camera through a nonadjustable opening is focused on light - sensitive film at the back of the camera. b. light entering the camera through a light - sensitive opening is focused on 35mm film at the back of the camera. c. changeable lenses of different focal lengths allow light to enter the camera, which then forms the image on light - sensitive film.

Explanation:

• Option A: Cameras have adjustable openings (apertures), so "nonadjustable opening" is incorrect.
• Option B: The opening (aperture) is not "light - sensitive"; the film or sensor is. Also, not all still cameras use 35mm film.
• Option C: Still cameras use changeable lenses with different focal lengths. Light enters through the lens, and the lens focuses the light onto a light - sensitive surface (film or digital sensor) to form an image. This matches the working principle of a still camera.

Answer:

C. Changeable lenses of different focal lengths allow light to enter the camera, which then forms the image on light - sensitive film.