Question

Please help me solve The focal length is 79 cm.

Answer 1

Given:

The focal length is f = 79 cm

Also,

`q_(min)=-19\text{ cm}`

Required: p_min

Step-by-step explanation:

The p_min can be calculated as

`\begin{gathered} p_(min)=(fq_(min))/(q_(min)-f) \\ =\frac{(-79\text{ cm})(-19\text{ cm})}{-19\text{ cm}-(-79\text{ cm})} \\ =25.02\text{ cm} \end{gathered}`

Final Answer: The value of p_min is 25.02 cm.