12.5 points A diverging lens has a focal length of magnitude 20 2 cm. (a) Locate

Question

12.5 points A diverging lens has a focal length of magnitude 20 2 cm. (a) Locate the images for each of the following object distances 40.4 cm distance cm location-Select". 202 distance location l-Select- 10 1 cm distance location Select (b) is the image for the object at distance 404 real or virtual? O real virtual Is the image for the object at distance 20 2 real or virtual? O real virtual is the image for the object at distance 10.1 real or virtuar? O real virtual (c) Is the image for the object at distance 40.4 upright or iniverted? upright inverted is the image for the object at distance 20 2 upright or inverted? upright nverted s the image for the coject at distance 10 1 upright or invertea?

Explanation / Answer

f = - 20.2 cm

object disTAce = p

image distance = q

Applying formula, 1/f = 1/p + 1/q

(A) putting p = 40.4 cm

q = -13.5 cm

Ans: 13.5 cm

in front of lens

(B) p = 20.2

q = - 10.1 cm

Ans: 10.1 cm

in front of lens

(C) p = 10.1

q = - 6.73 cm

Ans: 6.73 cm

in front of lens

(B) Virtual

virtual

Virtual

(C) Upright

Upright

Upright

(D) m = -q /p

Ans: 0.334

0.5

0.67

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