A 4.0-cm-tall object is 11 cm in front of a diverging lens that has a -20...

Question

Question

A 4.0-cm-tall object is 11 cm in front of a diverging lens that has a -20 cm focal length.

A. calculate the image position

B. calculate the image height

science physics

Answer 1

Answer #1

A)

Using lens formula,

1/f = 1/u + 1/v

1/-20 = 1/11 + 1/v

1/v = - (1/20) - (1/11)

1/v = - 0.14

v = - 1/0.14

Image distance, v = - 7.09 cm

B)

Height, H = (-v/u) ho

H = (7.09/11) x 4 = 2.58 cm

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Answer 2

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