an object is placed 40 cm from A convex lens of focal length 20 cm. A) where wil

Question

an object is placed 40 cm from A convex lens of focal length 20 cm. A) where will be the magnification B) where the image be located in cm C) Will the image be real D) will the image be upright or inverted an object is placed 40 cm from A convex lens of focal length 20 cm. A) where will be the magnification B) where the image be located in cm C) Will the image be real D) will the image be upright or inverted A) where will be the magnification B) where the image be located in cm C) Will the image be real D) will the image be upright or inverted

Explanation / Answer

Part A)

Apply 1/f = 1/p + 1/q

1/20 = 1/40 + 1/q

q = 40 cm

M = -40/40

M = -1 (Negative means the image is inverted)

Part B)

The image location was found already in part A

That is at 40 cm

Part C)

The image is real since q is positive

Part D)

The image is inverted since M is negative

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