A camera uses a _______ to form an image on a piece of film at the back.

A camera uses a _______ to form an image on a piece of film at the back.

ایک کیمرہ فلم کے پچھلے حصے پر تصویر بنانے کے لیےاستعمال کرتا ہے۔
Explanation

 A convex lens is thicker at the centre than at the edges. 

A camera uses a convex lens to focus light rays and form an image on a piece of film or a digital sensor at the back, capturing the scene in front of it.