Two identical converging lenses of focal length 100 mm are placed 400 mm apart, and an object 40 mm tall is placed 230 mm to the left of the left lens.

a. Draw a scale diagram showing the three principal rays for te left lens, and use them to locate the image formed by this lens.

b. draw the principle rays for the right lens, and use them the locate the image formed by this lens. is te image formed by the right lens

c. real or virtual?

d. larger or smaller than the object?

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

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