Explanation:
Given that, you are taking a picture of a giraffe that is standing far away from you. The image is just too small, so you swap the 60-mm-focal-length lens in your camera for a 960 mm telephoto lens such that,
[tex]m_1=960\ mm[/tex]
[tex]m_2=60\ mm[/tex]
We need to find the the factor with which the size of the image increases. It can be calculated by taking ratios of both [tex]m_1\ and\ m_2[/tex]
So, [tex]\dfrac{m_1}{m_2}=\dfrac{960}{60}[/tex]
[tex]\dfrac{m_1}{m_2}=16[/tex]
So, the size of image increases by a factor of 16. Hence, this is the required solution.
