Answer: [tex]0.446\ D\ \text{to}\ 1.298\ D[/tex]
Explanation:
Given
Camera has an adjustable focal length ranging from [tex]77[/tex] to [tex]224[/tex] mm
Power is given by Reciprocal of focal length in meter
Power corresponding to 77 cm
[tex]\Rightarrow P=\dfrac{1}{0.77}\\\\\Rightarrow P=1.298\ D[/tex]
Power corresponding to 224 cm
[tex]\Rightarrow P=\dfrac{1}{2.24}\\\\\Rightarrow P=0.446\ D[/tex]
Therefore, the range of the power is [tex]0.446\ D\ \text{to}\ 1.298\ D[/tex]
