Recent content by Maria H

I feel like a stupied girl. :( It think it's not very hard, but I have to have the correct answear before i send it to my school. Homework Statement We sometimes exposed to electric fields. To determine whether there is a risk of flashover is a rule of thumb which states that the sparks will...

Thank you very much Rl.Bhat! Okey, this is what think. 1/490m+1/0,036m=27,7798.. 1/27,7798..= 0,03599m 35,99mm It means that a focal length of 35mm is to short. The photografer have to use the length of 50mm. Right? Now I have. a=490m f=0,050m If I use 1 + 1/m = a/f with m=h/H i...

Homework Statement A building will be photographed with a camera. The distance is 490 m to the building. The building height is 85m and width 40m. You can choose between 35mm, 50mm, 135mm and 250mm lenses (focal length of lenses). Select the lens that gives the largest image of the building...