How did social and political events influence the art produced in russia?

changeable lenses of different focal lengths allow light to enter the camera, which then forms the image on light-sensitive film" is the one among the following statements about working principle behind a basic still camera is true.

so a and d are wrong right off the bat. i'd go for c. hope i !

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i think it's about 10 mins.

actually i think that's wrong, but i don't know how to delete this.

but who knows it might be right.