For a combination of thin lenses in contact, if the individual magnifi…

Question

For a combination of thin lenses in contact, if the individual magnifications are $m_1, m_2, m_3, \dots$, then the total magnification is

Accepted Answer

C. $m=m_1m_2m_3\dots$

In a multi-lens system, the image formed by one lens acts as the object for the next. Therefore each stage multiplies the image size by its own magnification, so the overall magnification is the product: $m=m_1m_2m_3\dots$. Addition applies to powers, not to magnifications.

Answer

$m=m_1+m_2+m_3+\dots$

Answer

$m=\dfrac{m_1}{m_2m_3\dots}$

Answer

$m=\dfrac{1}{m_1} + \dfrac{1}{m_2}+\dfrac{1}{m_3}+\dots$