Question

Your camera has a 35-mm focal length lens. When you take a photograph of a distant mountain, how far from that lens is the real image of the mountain?

Answer 1

idk srry

Answer 2

hint: lookup lens equations

Answer 3

The distant object is at optical infinity. The image will form at the focal point of the lens. See if you can figure out that distance.

Answer 4

I used F= 35mm = 0.035m
object distance (o) = unknown
image distance = (is this 35 mm as well?)
If it is 35 mm then \[o=\frac{ 0.035*0.035 }{0.035-0.035}\]
and you cannot have 0 in the denominator, so I am confused