Question

If the space between the lenses in the lens combination shown were filled with water, what would happen to the focal length and power of the lens combination?

Focal Length Power

• A. Decreased increased
• B. Decreased unchanged
• C. Increased unchanged
• D. Increased decreased

Answer 1

Answer: (D)

Increased decreased

Answer 2

P = (m – 1) $\left( \frac { 1 } { \mathrm { R } _ { 1 } } - \frac { 1 } { \mathrm { R } _ { 2 } } \right)$

m-decreases, P-decreases, f-increases