Anyone good at physics? Please help me with my question!?

Question

The focal length of a converging lens is 0.40 meters. An object is place 1.5 meters from the lens. The distance between the lens and the image is ?

Can someone help me? I asked my teacher but she is busy right now.

Answer 1

Ok, just use the formula: 1/f = 1/s + 1/d

f=the focal length (remember, f is positive if converging lens or - if diverging lens).

s= distance between lens and image

d= distance between lens and object

In your problem, f= positive .40 meters

d=1.5 meters

Now plug in to solve for s, which is the distance between the lens and image. Remember that all units need to be in meters!