Question

A problem we were discussing.

Answer 1

Position 1: \(u = -x_1\), \(v = 90 - x_1\)
Position 2: \(u = -x_2, ~v = 90 - x_2\)

Answer 2

\[\dfrac{90 - x_1}{-x_1} = 4 \times \left(\dfrac{90 - x_2}{-x_2}\right)\]

Answer 3

The distance between the two positions is 30 cm.

Answer 4

Actually, I should start over again...

Answer 5

These are the two positions. Which one would produce a lot more magnified image?

Answer 6

closer