You're viewing an object that's 0.5m away with a concave(diverging) lens of focal length 5cm. How far from the lens does the image appear to be?

Please you have to apply this formula:

1/p+1/q=-1/f

where p is the distance between the object and lence;

q is the distance between the image and the lens,

f is the focal distance of the lens

So substituting your numerical data into the formula above, we have:

1/q=-1/f-1/p=-1/5-1/50=-11/50

so q=-50/11 cm

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