The lens equation

Question 1

how do you calculate the position of the image formed by a lens

Answer 1

1/f = 1/u + 1/v
f = focal length, u = object distance, v = image distance

Question 2

what is a real image

Answer 2

images that can be focused onto a screen

Question 3

what is the virtual image

Answer 3

image viewed through a magnifying glass appears to be behind the lens and cannot be focused onto a screen

Question 4

use the equation 1/f = 1/u + 1/v

Answer 4

s