The bellows of an adjustable camera can be extended so that the largest distance from the lens to the film is 1.43 times the focal length. If the focal length of the lens is 5.18 cm, what is the distance from the closest object that can be sharply focused on the film? Answer in units of cm.

4

explanation:

4

the answer is 12 as i may remember

: )

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.