A converging lens has a focal length of 19.3 cm. Give the image distance and mag

Question

A converging lens has a focal length of 19.3 cm. Give the image distance and magnification for the following object distances, using the correct sign conventions. Select all options that correctly describe the image. If the image is located at infinity, enter "infinity" for the image distance and for the magnification, and select "no image is formed".

(a) object distance = 39.4 cm
image distance
cm?
magnification? ?

inverted?

real ?

same side of lens as the object ?

up right?

virtual ?

no image is formed?

side of lens opposite the object?

(b) object distance = 19.3 cm
image distance
cm?
magnification? ?

up right?

inverted?

real?

no image is formed ?

same side of lens as the object?

side of lens opposite the object?

virtual?

(c) object distance = 10.6 cm
image distance
cm?
magnification? ?

inverted ?

no image is formed?

side of lens opposite the object ?

up right ?

same side of lens as the object?

real ?

virtual?

Explanation / Answer

Solution: (a) We have u = - 39.4 cm, f = + 19.3 cm.

From thin lens formula, 1/v

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