Physics

Problem

An object

2\,\text{cm}

high is placed

30\,\text{cm}

in front of (i) a concave mirror of focal length

15\,\text{cm}

and (ii) a concave (diverging) lens of focal length

15\,\text{cm}

. Using the Cartesian sign convention, the magnifications produced are

m_1

and

m_2

respectively. What is the ratio

m_1:m_2

? a)

1:-3

-3:1

-1:1

3:1